150-470: [REDACTED] Syngman Rhee [REDACTED] Lee Ki-poong † [REDACTED] Choi In-Kyu [REDACTED] The April Revolution ( Korean : 4.19 혁명 ), also called the April 19 Revolution or April 19 Movement , were mass protests in South Korea against President Syngman Rhee and the First Republic from April 11 to 26, 1960, which led to Rhee's resignation. Protests opposing Rhee were started by student and labor groups in
300-523: A U.S. zone and a Soviet zone . Dean Rusk and Charles H. Bonesteel III suggested the 38th parallel as the dividing line, as it placed Seoul under U.S. control. To the surprise of Rusk and Bonesteel, the Soviets accepted their proposal and agreed to divide Korea. Despite intentions to liberate a unified peninsula in the 1943 Cairo Declaration , escalating tensions between the Soviet Union and
450-411: A blood test for biomarkers (the cardiac protein troponin ). When there is evidence of an MI, it may be classified as an ST elevation myocardial infarction (STEMI) or Non-ST elevation myocardial infarction (NSTEMI) based on the results of an ECG . The phrase "heart attack" is often used non-specifically to refer to myocardial infarction. An MI is different from—but can cause— cardiac arrest , where
600-658: A cold sweat , feeling tired , and decreased level of consciousness . About 30% of people have atypical symptoms. Women more often present without chest pain and instead have neck pain, arm pain or feel tired. Among those over 75 years old, about 5% have had an MI with little or no history of symptoms. An MI may cause heart failure , an irregular heartbeat , cardiogenic shock or cardiac arrest . Most MIs occur due to coronary artery disease . Risk factors include high blood pressure , smoking , diabetes , lack of exercise , obesity , high blood cholesterol , poor diet, and excessive alcohol intake . The complete blockage of
750-475: A coronary artery caused by a rupture of an atherosclerotic plaque is usually the underlying mechanism of an MI. MIs are less commonly caused by coronary artery spasms , which may be due to cocaine , significant emotional stress (often known as Takotsubo syndrome or broken heart syndrome ) and extreme cold, among others. Many tests are helpful to help with diagnosis, including electrocardiograms (ECGs), blood tests and coronary angiography . An ECG, which
900-568: A coup d'état overthrowing the short-lived Second Republic of South Korea and replacing it with a military junta and later the autocratic Third Republic of South Korea . On July 19, 1965, 90-year-old Rhee died at 19:35 Korean time in Honolulu . South Korea South Korea , officially the Republic of Korea ( ROK ), is a country in East Asia . It constitutes the southern half of
1050-413: A feed-in tariff . Around 350 residential micro combined heat and power units were installed in 2012. In 2017, South Korea was the world's seventh largest emitter of carbon emissions and the fifth largest emitter per capita. President Moon Jae-in pledged to reduce greenhouse gas emissions to zero in 2050. Seoul's tap water recently became safe to drink, with city officials branding it " Arisu " in
1200-481: A 20 centimeter-long tear-gas grenade, which had penetrated from his eyes to the back of his head. This indicated that the police had shot the tear gas to an angle less than 45 degrees, which could be fatal if shot directly at a person's face. Rhee's regime tried to censor news of this incident. However, the story was reported by the Korean press along with a picture of Kim when his body was first found, and delivered to
1350-474: A benefit of 15 to 45%. Physical activity can reduce the risk of cardiovascular disease, and people at risk are advised to engage in 150 minutes of moderate or 75 minutes of vigorous intensity aerobic exercise a week. Keeping a healthy weight, drinking alcohol within the recommended limits, and quitting smoking reduce the risk of cardiovascular disease. Substituting unsaturated fats such as olive oil and rapeseed oil instead of saturated fats may reduce
1500-437: A bid to convince the public. Efforts have also been made with afforestation projects. Another multibillion-dollar project was the restoration of Cheonggyecheon , a stream running through downtown Seoul that had earlier been paved over by a motorway. One major challenge is air quality, with acid rain, sulfur oxides, and annual yellow dust storms being particular problems. It is acknowledged that many of these difficulties are
1650-640: A brief unification of the Three Kingdoms and becoming the most dominant power on the Korean Peninsula. In addition to contesting control of the Korean Peninsula, Goguryeo had many military conflicts with various Chinese dynasties, most notably the Goguryeo–Sui War , in which Goguryeo defeated a huge force said to number over a million men. Baekje was a maritime power, sometimes called the " Phoenicia of East Asia". Its maritime ability
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#17327656880451800-714: A close election over the Democratic Party candidate by the narrowest margin ever. Yoon was sworn in on May 10, 2022. South Korea occupies the southern portion of the Korean Peninsula , which extends some 1,100 km (680 mi) from the Continental and East Asian mainland. This mountainous peninsula is flanked by the Yellow Sea to the west and the Sea of Japan to the east. Its southern tip lies on
1950-428: A common, and sometimes the only symptom, occurring when damage to the heart limits the output of the left ventricle , with breathlessness arising either from low oxygen in the blood or pulmonary edema . Other less common symptoms include weakness, light-headedness , palpitations , and abnormalities in heart rate or blood pressure . These symptoms are likely induced by a massive surge of catecholamines from
2100-563: A conservative government was elected in 2007 led by President Lee Myung-bak , former mayor of Seoul . Meanwhile, South Korea and Japan jointly co-hosted the 2002 FIFA World Cup . However, South Korean and Japanese relations later soured because of conflicting claims of sovereignty over the Liancourt Rocks . In 2010, there was an escalation in attacks by North Korea. In March 2010 the South Korean warship ROKS Cheonan
2250-517: A coup. Yi Seong-gye declared the new name of Korea as "Joseon" in reference to Gojoseon, and moved the capital to Hanseong (one of the old names of Seoul ). The first 200 years of the Joseon dynasty were marked by peace and saw great advancements in science and education, as well as the creation of Hangul by Sejong the Great to promote literacy among the common people. The prevailing ideology of
2400-578: A few decades. As Lelang Commandery was destroyed and rebuilt around this time, the place gradually moved toward Liaodong. Thus, its force was diminished and only served as a trade center until it was conquered by Goguryeo in 313. Beginning around 300 BC, the Japonic -speaking Yayoi people from the Korean Peninsula entered the Japanese islands and displaced or intermingled with the original Jōmon inhabitants. The linguistic homeland of Proto- Koreans
2550-480: A late consequence of Kawasaki disease . Calcium deposits in the coronary arteries can be detected with CT scans . Calcium seen in coronary arteries can provide predictive information beyond that of classical risk factors. High blood levels of the amino acid homocysteine is associated with premature atherosclerosis; whether elevated homocysteine in the normal range is causal is controversial. In people without evident coronary artery disease , possible causes for
2700-431: A myocardial infarction before age 55 years, or a female first-degree relative (mother, sister) less than age 65 increases a person's risk of MI. Genome-wide association studies have found 27 genetic variants that are associated with an increased risk of myocardial infarction. The strongest association of MI has been found with chromosome 9 on the short arm p at locus 21, which contains genes CDKN2A and 2B, although
2850-463: A myocardial infarction increases with older age, low physical activity, and low socioeconomic status . Heart attacks appear to occur more commonly in the morning hours, especially between 6AM and noon. Evidence suggests that heart attacks are at least three times more likely to occur in the morning than in the late evening. Shift work is also associated with a higher risk of MI. One analysis has found an increase in heart attacks immediately following
3000-406: A myocardial infarction. Spasm of coronary arteries, such as Prinzmetal's angina may cause blockage. If impaired blood flow to the heart lasts long enough, it triggers a process called the ischemic cascade ; the heart cells in the territory of the blocked coronary artery die ( infarction ), chiefly through necrosis , and do not grow back. A collagen scar forms in their place. When an artery
3150-543: A myocardial infarction. The flow of blood can be imaged, and contrast dyes may be given to improve image. Other scans using radioactive contrast include SPECT CT-scans using thallium , sestamibi ( MIBI scans ) or tetrofosmin ; or a PET scan using Fludeoxyglucose or rubidium-82 . These nuclear medicine scans can visualize the perfusion of heart muscle. SPECT may also be used to determine viability of tissue, and whether areas of ischemia are inducible. Medical societies and professional guidelines recommend that
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#17327656880453300-475: A nationwide next-generation network that will be 10 times faster than broadband facilities, in order to reduce energy usage. The renewable portfolio standard program with renewable energy certificates runs from 2012 to 2022. Quota systems favor large, vertically integrated generators and multinational electric utilities, if only because certificates are generally denominated in units of one megawatt-hour. They are also more difficult to design and implement than
3450-659: A new renaissance of the Joseon dynasty during the 18th century. In the 19th century, Joseon began experiencing economic difficulties and widespread uprisings, including the Donghak Peasant Revolution . The royal in-law families had gained control of the government, leading to mass corruption and weakening of the state. In addition, the strict isolationism of the Joseon government that earned it "the hermit kingdom " became increasing ineffective due to increasing encroachment from powers such as Japan, Russia, and
3600-611: A non-violent protest at the National Assembly against police violence and demanded new elections. However, they were attacked by gangs funded by Rhee's supporters as they returned to their campus . On April 19 (called "Bloody Tuesday"), over 100,000 high school and university students marched to the Blue House calling for Rhee's resignation. Police opened fire, killing approximately 180 and wounding thousands. The Rhee government proclaimed martial law in order to suppress
3750-637: A person localizes the chest pain by clenching one or both fists over their sternum , has classically been thought to be predictive of cardiac chest pain, although a prospective observational study showed it had a poor positive predictive value . Typically, chest pain because of ischemia, be it unstable angina or myocardial infarction, lessens with the use of nitroglycerin , but nitroglycerin may also relieve chest pain arising from non-cardiac causes. Chest pain may be accompanied by sweating , nausea or vomiting, and fainting , and these symptoms may also occur without any pain at all. Dizziness or lightheadedness
3900-456: A political prisoner sentenced to death (later commuted to exile). He won against the backdrop of the 1997 Asian financial crisis , where he took IMF advice to restructure the economy and the nation soon recovered its economic growth, albeit at a slower pace. In June 2000, as part of President Kim Dae-jung's " Sunshine Policy " of engagement, a North–South summit took place in Pyongyang ,
4050-407: A previous heart attack is also suggestive. The pain associated with MI is usually diffuse, does not change with position, and lasts for more than 20 minutes. It might be described as pressure, tightness, knifelike, tearing, burning sensation (all these are also manifested during other diseases). It could be felt as an unexplained anxiety, and pain might be absent altogether. Levine's sign , in which
4200-706: A result of South Korea's proximity to China, which is a major air polluter. South Korea had a 2019 Forest Landscape Integrity Index mean score of 6.02/10, ranking it 87th globally out of 172 countries. South Korea is a member of the Antarctic-Environmental Protocol , Antarctic Treaty , Biodiversity Treaty , Kyoto Protocol (forming the Environmental Integrity Group (EIG), regarding UNFCCC , with Mexico and Switzerland), Desertification , Endangered Species , Environmental Modification , Hazardous Wastes , Law of
4350-668: A revolutionary tribunal on various charges. Multiple death sentences were imposed, with some of them being carried out. Among those executed were the officials responsible for issuing the order to fire. Secretary of the Interior Choi In-Kyu, the official most responsible for the order, and Kwak Yong-ju, the Presidential security chief, who was also involved in the shootings, were both hanged at Seodaemun Prison on December 21, 1961. On May 16, 1961, following months of political instability, General Park Chung Hee launched
4500-560: A rise in biomarkers, a rise in the ST segment , changes in the shape or flipping of T waves , new Q waves , or a new left bundle branch block can be used to diagnose an AMI. In addition, ST elevation can be used to diagnose an ST segment myocardial infarction (STEMI). A rise must be new in V2 and V3 ≥2 mm (0,2 mV) for males or ≥1.5 mm (0.15 mV) for females or ≥1 mm (0.1 mV) in two other adjacent chest or limb leads . ST elevation
4650-549: A series of massive public demonstrations from November 2016, and she was removed from office. After the fallout of Park's impeachment and dismissal, elections were held and Moon Jae-in of the Democratic Party won the presidency, assuming office on May 10, 2017. His tenure saw an improving political relationship with North Korea, some increasing divergence in the military alliance with the United States, and
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4800-409: A series of leads placed on a person's chest that measure electrical activity associated with contraction of the heart muscle. The taking of an ECG is an important part of the workup of an AMI, and ECGs are often not just taken once but may be repeated over minutes to hours, or in response to changes in signs or symptoms. ECG readouts produce a waveform with different labeled features. In addition to
4950-526: A series of successful battles of attrition, the Japanese forces were eventually forced to withdraw, and relations between all parties became normalized. However, the Manchus took advantage of Joseon's war-weakened state and invaded in 1627 and 1637 and then went on to conquer the destabilized Ming dynasty. After normalizing relations with the new Qing dynasty , Joseon experienced a nearly 200-year period of peace. Kings Yeongjo and Jeongjo particularly led
5100-477: A short exile, Rhee was unable to return due to public opposition. The First Republic was replaced by the Second Republic of South Korea , adopting a parliamentary system to remove power from the office of the president. Yun Bo-seon was elected president on August 13, 1960, but real power was vested in the prime minister, Chang Myon. A National Assembly investigating committee found that the firing into
5250-473: A significant boost for South Korea's global image and economy. South Korea was formally invited to become a member of the United Nations in 1991. The transition of Korea from autocracy to modern democracy was marked in 1997 by the election of Kim Dae-jung, who was sworn in as the eighth president of South Korea on February 25, 1998. His election was significant given that he had in earlier years been
5400-406: A significant effect on blood cholesterol and thus recommendations about its consumption may not be needed. Trans fats do appear to increase risk. Acute and prolonged intake of high quantities of alcoholic drinks (3–4 or more daily) increases the risk of a heart attack. Family history of ischemic heart disease or MI, particularly if one has a male first-degree relative (father, brother) who had
5550-500: A southwestern region of mountains and valleys; and a southeastern region dominated by the broad basin of the Nakdong River . South Korea is home to three terrestrial ecoregions: Central Korean deciduous forests , Manchurian mixed forests , and Southern Korea evergreen forests . South Korea's terrain is mostly mountainous, most of which is not arable . Lowlands , located primarily in the west and southeast, make up only 30% of
5700-589: A total of 186 people were killed during the two weeks of protest. Rhee resigned on April 26 before fleeing to exile in the United States , and was replaced by Yun Posun , beginning the transition to the Second Republic of South Korea . Syngman Rhee had been the first President of South Korea since the 1948 presidential election . He oversaw the transition of power from the United States Army Military Government to
5850-536: A whole, rather than just the South Korean state. The Korean Peninsula was inhabited as early as the Lower Paleolithic period. According to Korea's founding mythology , the history of Korea begins with the founding of Joseon (also known as " Gojoseon ", or "Old Joseon", to differentiate it with the 14th century dynasty) in 2333 BCE by the legendary Dangun . Gojoseon was noted in Chinese records in
6000-425: Is a comprehensive overhaul of South Korea's economy, utilizing nearly two percent of the national GDP. The greening initiative includes such efforts as a nationwide bike network, solar and wind energy, lowering oil dependent vehicles, backing daylight saving time and extensive usage of environmentally friendly technologies such as LEDs in electronics and lighting. The country—one of the world's most wired—plans to build
6150-601: Is a known risk factor, particularly high low-density lipoprotein , low high-density lipoprotein , and high triglycerides . Many risk factors for myocardial infarction are potentially modifiable, with the most important being tobacco smoking (including secondhand smoke ). Smoking appears to be the cause of about 36% and obesity the cause of 20% of coronary artery disease . Lack of physical activity has been linked to 7–12% of cases. Less common causes include stress-related causes such as job stress , which accounts for about 3% of cases, and chronic high stress levels. There
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6300-454: Is a recording of the heart's electrical activity, may confirm an ST elevation MI ( STEMI ), if ST elevation is present. Commonly used blood tests include troponin and less often creatine kinase MB . Treatment of an MI is time-critical. Aspirin is an appropriate immediate treatment for a suspected MI. Nitroglycerin or opioids may be used to help with chest pain; however, they do not improve overall outcomes. Supplemental oxygen
6450-494: Is affected by the East Asian monsoon , with precipitation heavier in summer during a short rainy season called jangma , which begins end of June and lasts through the end of July. In Seoul, the average January temperature range is −7 to 1 °C (19 to 34 °F), and the average August temperature range is 22 to 30 °C (72 to 86 °F). Winter temperatures are higher along the southern coast and considerably lower in
6600-806: Is also an important modifiable risk. Short-term exposure to air pollution such as carbon monoxide , nitrogen dioxide , and sulfur dioxide (but not ozone ) has been associated with MI and other acute cardiovascular events. For sudden cardiac deaths, every increment of 30 units in Pollutant Standards Index correlated with an 8% increased risk of out-of-hospital cardiac arrest on the day of exposure. Extremes of temperature are also associated. A number of acute and chronic infections including Chlamydophila pneumoniae , influenza , Helicobacter pylori , and Porphyromonas gingivalis among others have been linked to atherosclerosis and myocardial infarction. Myocardial infarction can also occur as
6750-412: Is also the site of South Korea's highest point: Hallasan , an extinct volcano , reaches 1,950 meters (6,400 feet) above sea level . The easternmost islands of South Korea include Ulleungdo and Liancourt Rocks (Dokdo/Takeshima), while Marado and Socotra Rock are the southernmost islands of South Korea. South Korea tends to have a humid continental climate and a humid subtropical climate , and
6900-499: Is associated with infarction, and may be preceded by changes indicating ischemia, such as ST depression or inversion of the T waves. Abnormalities can help differentiate the location of an infarct, based on the leads that are affected by changes. Early STEMIs may be preceded by peaked T waves. Other ECG abnormalities relating to complications of acute myocardial infarctions may also be evident, such as atrial or ventricular fibrillation . Noninvasive imaging plays an important role in
7050-517: Is blocked, cells lack oxygen , needed to produce ATP in mitochondria . ATP is required for the maintenance of electrolyte balance, particularly through the Na/K ATPase . This leads to an ischemic cascade of intracellular changes, necrosis and apoptosis of affected cells. Cells in the area with the worst blood supply, just below the inner surface of the heart ( endocardium ), are most susceptible to damage. Ischemia first affects this region,
7200-433: Is common and occurs due to reduction in oxygen and blood to the brain. In females, the most common symptoms of myocardial infarction include shortness of breath, weakness, and fatigue . Females are more likely to have unusual or unexplained tiredness and nausea or vomiting as symptoms. Females having heart attacks are more likely to have palpitations, back pain, labored breath, vomiting, and left arm pain than males, although
7350-505: Is concentrated in the summer months of June through September. The southern coast is subject to late summer typhoons that bring strong winds, heavy rains and sometimes floods. The average annual precipitation varies from 1,370 millimeters (54 in) in Seoul to 1,470 millimeters (58 in) in Busan. During the first 20 years of South Korea's growth surge, little effort was made to preserve
7500-682: Is located somewhere in southern Siberia / Manchuria , such as the Liao River area or the Amur River area. Proto-Koreans arrived in the southern part of the Korean Peninsula at around 300 BC, replacing and assimilating Japonic-speakers and likely causing the Yayoi migration. During the Proto–Three Kingdoms period , the states of Buyeo , Okjeo , Dongye , and Samhan occupied the whole Korean peninsula and southern Manchuria. From them,
7650-477: Is not the only cause of myocardial infarction, but it may exacerbate or contribute to other causes. A myocardial infarction may result from a heart with a limited blood supply subject to increased oxygen demands, such as in fever, a fast heart rate , hyperthyroidism , too few red blood cells in the bloodstream , or low blood pressure . Damage or failure of procedures such as percutaneous coronary intervention (PCI) or coronary artery bypass grafts (CABG) may cause
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#17327656880457800-430: Is one of the most common symptoms of acute myocardial infarction and is often described as a sensation of tightness, pressure, or squeezing. Pain radiates most often to the left arm, but may also radiate to the lower jaw, neck, right arm, back, and upper abdomen . The pain most suggestive of an acute MI, with the highest likelihood ratio , is pain radiating to the right arm and shoulder. Similarly, chest pain similar to
7950-414: Is recommended in those with low oxygen levels or shortness of breath. In a STEMI, treatments attempt to restore blood flow to the heart and include percutaneous coronary intervention (PCI), where the arteries are pushed open and may be stented , or thrombolysis , where the blockage is removed using medications. People who have a non-ST elevation myocardial infarction ( NSTEMI ) are often managed with
8100-412: Is still unable to be distributed to the affected myocardium despite clearing the occlusion—also contributes to myocardial injury. Topical endothelial swelling is one of many factors contributing to this phenomenon. A myocardial infarction, according to current consensus, is defined by elevated cardiac biomarkers with a rising or falling trend and at least one of the following: A myocardial infarction
8250-404: Is the world's ninth-largest exporter and ninth-largest importer . Its armed forces are ranked as one of the world's strongest militaries, with the world's second-largest standing army by military and paramilitary personnel . In the 21st century, South Korea has been renowned for its globally influential pop culture, particularly in music , TV dramas , and cinema , a phenomenon referred to as
8400-457: Is usually clinically classified as an ST-elevation MI (STEMI) or a non-ST elevation MI (NSTEMI). These are based on ST elevation , a portion of a heartbeat graphically recorded on an ECG . STEMIs make up about 25–40% of myocardial infarctions. A more explicit classification system, based on international consensus in 2012, also exists. This classifies myocardial infarctions into five types: There are many different biomarkers used to determine
8550-445: Is varying evidence about the importance of saturated fat in the development of myocardial infarctions. Eating polyunsaturated fat instead of saturated fats has been shown in studies to be associated with a decreased risk of myocardial infarction, while other studies find little evidence that reducing dietary saturated fat or increasing polyunsaturated fat intake affects heart attack risk. Dietary cholesterol does not appear to have
8700-466: The 1987 constitution with a unicameral legislature, the National Assembly . It is considered a regional power and a developed country , with its economy ranked as the world's fourteenth-largest by nominal GDP and the fourteenth-largest by PPP-adjusted GDP . Its citizens enjoy one of the world's fastest Internet connection speeds and densest high-speed railway networks . The country
8850-530: The Fifth Republic led by Chun Doo-hwan , which violently seized power by two coups and brutally suppressed the Gwangju Uprising . The June Democratic Struggle of 1987 ended authoritarian rule , forming the current Sixth Republic. The country is now considered among the most advanced democracies in continental and East Asia. South Korea maintains a unitary presidential republic under
9000-722: The Government of South Korea and the establishment of the First Republic of Korea , and led South Korea during the Korean War . With American patronage in the Cold War , Rhee adopted a strongly anti-communist and pro- American stance. He used the threat of communism as an excuse to target perceived opposition with heavy-handed repression . At first, this was tolerated in the name of political unity and fear of reprisals. Rhee faced increasing domestic discontent following
9150-676: The Gwangju Democratization Movement . Chun subsequently created the National Defense Emergency Policy Committee and took the presidency according to his political plan. Chun and his government held South Korea under a despotic rule until 1987, when a Seoul National University student, Park Jong-chul , was tortured to death. On June 10 , the Catholic Priests Association for Justice revealed
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#17327656880459300-559: The Korea Strait and the East China Sea . The country, including all its islands, lies between latitudes 33° and 39°N , and longitudes 124° and 130°E . Its total area is 100,410 square kilometers (38,768.52 sq mi). South Korea can be divided into four general regions: an eastern region of high mountain ranges and narrow coastal plains; a western region of broad coastal plains, river basins , and rolling hills;
9450-516: The Korean Peninsula and borders North Korea along the Korean Demilitarized Zone ; though it also claims the land border with China and Russia . The country's western border is formed by the Yellow Sea , while its eastern border is defined by the Sea of Japan . South Korea claims to be the sole legitimate government of the entire peninsula and adjacent islands . It has a population of 51.96 million, of which half live in
9600-579: The Korean War , the Cold War 's first major conflict, which continued until 1953. At the time, the Soviet Union had boycotted the UN, thus forfeiting their veto rights . This allowed the UN to intervene in a civil war when it became apparent that the superior North Korean forces would unify the entire country. The Soviet Union and China backed North Korea, with the later participation of millions of Chinese troops . After an ebb and flow that saw both sides facing defeat with massive losses among Korean civilians in both
9750-807: The Korean Wave . It is a member of the OECD 's Development Assistance Committee , the G20 , the IPEF , and the Paris Club . The name Korea is an exonym , although it was derived from a historical kingdom name, Goryeo ( Revised Romanization ) or Koryŏ ( McCune–Reischauer ). Goryeo was the shortened name officially adopted by Goguryeo in the 5th century and the name of its 10th-century successor state Goryeo. Visiting Arab and Persian merchants pronounced its name as "Korea". The modern name of Korea appears in
9900-488: The Later Three Kingdoms period in the late 9th century. Buddhism flourished during this time. Many Korean Buddhists gained great fame among Chinese Buddhist circles and greatly contributed to Chinese Buddhism . Examples of significant Korean Buddhists from this period include Woncheuk , Wonhyo , Uisang , Musang , and Kim Gyo-gak . Kim was a Silla prince whose influence made Mount Jiuhua one of
10050-569: The Mongol invasions in the 13th century greatly weakened the kingdom. Goryeo was never conquered by the Mongols, but exhausted after three decades of fighting, the Korean court sent its crown prince to the Yuan capital to swear allegiance to Kublai Khan , who accepted and married one of his daughters to the Korean crown prince. Henceforth, Goryeo continued to rule Korea, though as a tributary ally to
10200-585: The National Assembly an amendment to the National Security Law giving the government broad new powers to curtail freedom of the press and prevent members of the opposition from voting. In 1959, Rhee was shocked and threatened when the United States reduced its economic aid to South Korea from a high of $ 382,893,000 in 1957 to $ 222,204,000, and began taking desperate measures to ensure his political survival. The March 1960 presidential election saw two main parties running against Rhee. These were
10350-599: The People's Volunteer Army from China with Soviet assistance . The war left 3 million Koreans dead and the economy in ruins . The authoritarian First Republic of Korea led by Syngman Rhee was overthrown in the April Revolution of 1960. However, the Second Republic failed to control the revolutionary fervor. The May 16 coup of 1961 led by Park Chung Hee put an end to the Second Republic, signaling
10500-546: The Seoul Capital Area , the ninth most populous metropolitan area in the world . Other major cities include Busan , Daegu , and Incheon . The Korean Peninsula was inhabited as early as the Lower Paleolithic period. Its first kingdom was noted in Chinese records in the early 7th century BCE. After the unification of the Three Kingdoms of Korea into Silla and Balhae in the late 7th century, Korea
10650-478: The Seoul subway system , and laid the foundation for economic development during his 17-year tenure, which ended with his assassination in 1979. The years after Park's assassination were marked again by political turmoil, as the previously suppressed opposition leaders all campaigned to run for president in the sudden political void. In 1979, General Chun Doo-hwan led the coup d'état of December Twelfth . Following
10800-402: The Three Kingdoms of Korea emerged: Goguryeo , Baekje , and Silla . Goguryeo, the largest and most powerful among them, was a highly militaristic state and competed with various Chinese dynasties during its 700 years of history. Goguryeo experienced a golden age under Gwanggaeto the Great and his son Jangsu , who both subdued Baekje and Silla during their respective reigns, achieving
10950-601: The United States . After negotiations on reunification failed, the southern zone became the Republic of Korea in August 1948, while the northern zone became the communist Democratic People's Republic of Korea the following month. In 1950, a North Korean invasion began the Korean War , which ended in 1953 after extensive fighting involving the American-led United Nations Command and
11100-548: The Walter Reed Army Medical Center but died there of a heart attack . The two deaths were widely perceived by the public as too much of a coincidence. Rhee was determined to see his protege Lee Ki-poong elected as the Vice President , a post chosen in a separate election on the same day. Lee ran against the Democratic Party candidate Chang Myon , who had been South Korea's ambassador to
11250-414: The coronary arteries of the heart , causing infarction (tissue death) to the heart muscle . The most common symptom is retrosternal chest pain or discomfort that classically radiates to the left shoulder, arm, or jaw. The pain may occasionally feel like heartburn . This is the dangerous type of Acute coronary syndrome . Other symptoms may include shortness of breath , nausea , feeling faint ,
11400-661: The elderly , in those with diabetes mellitus and after heart transplantation . In people with diabetes, differences in pain threshold , autonomic neuropathy , and psychological factors have been cited as possible explanations for the lack of symptoms. In heart transplantation, the donor heart is not fully innervated by the nervous system of the recipient. The most prominent risk factors for myocardial infarction are older age, actively smoking , high blood pressure , diabetes mellitus , and total cholesterol and high-density lipoprotein levels. Many risk factors of myocardial infarction are shared with coronary artery disease ,
11550-480: The health impact assessment of regional and local plans and policies. Most guidelines recommend combining different preventive strategies. A 2015 Cochrane Review found some evidence that such an approach might help with blood pressure , body mass index and waist circumference . However, there was insufficient evidence to show an effect on mortality or actual cardio-vascular events. Statins , drugs that act to lower blood cholesterol, decrease
11700-522: The single nucleotide polymorphisms that are implicated are within a non-coding region. The majority of these variants are in regions that have not been previously implicated in coronary artery disease. The following genes have an association with MI: PCSK9 , SORT1 , MIA3 , WDR12 , MRAS , PHACTR1 , LPA , TCF21 , MTHFDSL , ZC3HC1 , CDKN2A , 2B , ABO , PDGF0 , APOA5 , MNF1ASM283 , COL4A1 , HHIPC1 , SMAD3 , ADAMTS7 , RAS1 , SMG6 , SNF8 , LDLR , SLC5A3 , MRPS6 , KCNE2 . The risk of having
11850-481: The subendocardial region, and tissue begins to die within 15–30 minutes of loss of blood supply. The dead tissue is surrounded by a zone of potentially reversible ischemia that progresses to become a full-thickness transmural infarct. The initial "wave" of infarction can take place over 3–4 hours. These changes are seen on gross pathology and cannot be predicted by the presence or absence of Q waves on an ECG. The position, size and extent of an infarct depends on
12000-551: The sympathetic nervous system , which occurs in response to pain and, where present, low blood pressure . Loss of consciousness can occur in myocardial infarctions due to inadequate blood flow to the brain and cardiogenic shock , and sudden death , frequently due to the development of ventricular fibrillation . When the brain was without oxygen for too long due to a myocardial infarction, coma and persistent vegetative state can occur. Cardiac arrest, and atypical symptoms such as palpitations , occur more frequently in females,
12150-602: The 8th and 9th centuries dominated the seas of East Asia and the trade between China, Korea, and Japan, most notably during the time of Jang Bogo . In addition, Silla people made overseas communities in China on the Shandong Peninsula and the mouth of the Yangtze River. However, Silla was later weakened due to internal strife and the revival of successor states Baekje and Goguryeo , which culminated into
12300-658: The Four Sacred Mountains of Chinese Buddhism. In 936, the Later Three Kingdoms were united by Wang Geon , who established Goryeo as the successor state of Goguryeo. Balhae had fallen to the Khitan Empire in 926, and a decade later the last crown prince of Balhae fled south to Goryeo, where he was warmly welcomed and included in the ruling family by Wang Geon, thus unifying the two successor nations of Goguryeo. Like Silla, Goryeo
12450-519: The Masan incident. On April 28, 1960, in an annex of Rhee's mansion, Lee Ki-poong's first son, Lee Kang-seok (1937 – April 28, 1960) shot Lee Ki-poong and his family and then killed himself in a murder-suicide . After the resignation of Rhee and the death of Lee Ki-poong, the rule of the Liberal Party government came to an end. Rhee was exiled to Hawaii on May 29, 1960. Originally planning to be
12600-603: The Mongols for the next 86 years. During this period, the two nations became intertwined as all subsequent Korean kings married Mongol princesses, and the last empress of the Yuan dynasty was a Korean princess. In the mid-14th century, Goryeo drove out the Mongols to regain its northern territories, briefly conquered Liaoyang , and defeated invasions by the Red Turbans . However, in 1392, General Yi Seong-gye , who had been ordered to attack China, turned his army around and staged
12750-601: The Russian Far East and was called the "Prosperous Country in the East". Late Silla was a wealthy country, and its metropolitan capital of Gyeongju grew to become the fourth largest city in the world. It experienced a golden age of art and culture, exemplified by monuments such as Hwangnyongsa , Seokguram , and the Emille Bell . It also carried on the maritime legacy and prowess of Baekje, and during
12900-606: The Sea , Marine Dumping , Comprehensive Nuclear-Test-Ban Treaty (not into force), Ozone Layer Protection , Ship Pollution , Tropical Timber 83 , Tropical Timber 94 , Wetlands , and Whaling . The South Korean government's structure is determined by the Constitution of the Republic of Korea . Like many democratic states, South Korea has a government divided into three branches: executive , judicial , and legislative . The executive and legislative branches operate primarily at
13050-446: The South Korean public. South Korea saw another milestone in 2012 with the first ever female President Park Geun-hye elected and assuming office. The daughter of former President Park Chung Hee, she carried on a conservative brand of politics. President Park Geun-hye's administration was formally accused of corruption, bribery, and influence-peddling for the involvement of close friend Choi Soon-sil in state affairs. There followed
13200-583: The United States during the Korean War. On March 15, the mostly bedridden Lee won the vice-presidential election with an abnormally wide margin, winning 8,225,000 votes while Myon received just 1,850,000 votes, and it became clear to the people that the vote was fraudulent . According to the Korean Report, Democratic rallies were prohibited throughout the nation and hundreds of pre-marked ballots were stuffed into boxes on election day. On March 15,
13350-709: The United States led to the division of Korea into two political entities in 1948: North Korea and South Korea. In the South, the United States appointed and supported the former head of the Korean Provisional Government Syngman Rhee as leader. Rhee won the first presidential elections of the newly declared Republic of Korea in May 1948. In the North, the Soviets backed a former anti-Japanese guerrilla and communist activist, Kim Il Sung , who
13500-474: The United States. In the developed world, the risk of death in those who have had a STEMI is about 10%. Rates of MI for a given age have decreased globally between 1990 and 2010. In 2011, an MI was one of the top five most expensive conditions during inpatient hospitalizations in the US, with a cost of about $ 11.5 billion for 612,000 hospital stays. Myocardial infarction (MI) refers to tissue death ( infarction ) of
13650-867: The United States. This is exemplified by the Joseon–United States Treaty of 1882 , in which it was compelled to open its borders. In the late 19th century, Japan became a significant regional power after winning the First Sino-Japanese War against Qing China and the Russo-Japanese War against the Russian Empire . In 1897, King Gojong, the last king of Korea , proclaimed Joseon as the Korean Empire . However, Japan compelled Korea to become its protectorate in 1905 and formally annexed it in 1910. What followed
13800-462: The Vietnam War. Park was heavily criticized as a ruthless military dictator, who in 1972 extended his rule by creating a new constitution , which gave the president sweeping (almost dictatorial) powers and permitted him to run for an unlimited number of six-year terms. The Korean economy developed significantly during Park's tenure. The government developed the nationwide expressway system ,
13950-432: The acute diagnostic algorithm; however, it can confirm a clinical suspicion of Chronic Coronary Syndrome when the patient's history, physical examination (including cardiac examination ) ECG, and cardiac biomarkers suggest coronary artery disease. Echocardiography , an ultrasound scan of the heart, is able to visualize the heart, its size, shape, and any abnormal motion of the heart walls as they beat that may indicate
14100-409: The affected artery, totality of the blockage, duration of the blockage, the presence of collateral blood vessels , oxygen demand, and success of interventional procedures. Tissue death and myocardial scarring alter the normal conduction pathways of the heart and weaken affected areas. The size and location put a person at risk of abnormal heart rhythms (arrhythmias) or heart block , aneurysm of
14250-432: The ancient kingdom of Gojoseon (2333 BCE). In 1897, the Joseon dynasty changed the country's official name from Joseon to Daehan Jeguk ( Korean Empire ). The name Daehan (Great Han) derives from Samhan (Three Han), referring to the Three Kingdoms of Korea , not the ancient confederacies in the southern Korean Peninsula. However, the name Joseon was still widely used by Koreans to refer to their country, though it
14400-647: The blood thinner heparin , with the additional use of PCI in those at high risk. In people with blockages of multiple coronary arteries and diabetes, coronary artery bypass surgery (CABG) may be recommended rather than angioplasty . After an MI, lifestyle modifications, along with long-term treatment with aspirin, beta blockers and statins , are typically recommended. Worldwide, about 15.9 million myocardial infarctions occurred in 2015. More than 3 million people had an ST elevation MI, and more than 4 million had an NSTEMI. STEMIs occur about twice as often in men as women. About one million people have an MI each year in
14550-584: The capital of North Korea. Later that year, Kim received the Nobel Peace Prize "for his work for democracy and human rights in South Korea and in East Asia in general, and for peace and reconciliation with North Korea in particular". However, because of discontent among the population for fruitless approaches to the North under the previous administrations and, amid North Korean provocations,
14700-453: The coexistence of the spellings Corea and Korea in 19th-century publications, some Koreans believe that Imperial Japan , around the time of the Japanese occupation, intentionally standardized the spelling of Korea , making Japan appear first alphabetically. After Goryeo was replaced by Joseon in 1392, Joseon became the official name for the entire territory, though it was not universally accepted. The new official name has its origin in
14850-589: The coup d'état, Chun planned to rise to power through several measures. On May 17, Chun forced the Cabinet to expand martial law to the whole nation, which had previously not applied to Jeju Island . The expanded martial law closed universities, banned political activities, and further curtailed the press. Chun's assumption of the presidency through the events of May 17 triggered nationwide protests demanding democracy; these protests were particularly focused, Gwangju , to which Chun sent special forces to violently suppress
15000-481: The crowd by the police had not been intended to disperse the crowds, but rather to kill protesters. It was later revealed at a criminal trial that Park Jong-pyo, the Chief of Public Security, tied rocks on Kim Ju-yul's dead body and threw him away into the Masan shore to prevent him floating up on the shore. Park was later sentenced to life imprisonment for killing Kim. Park was one of hundreds of people to be sentenced by
15150-470: The demonstrations. On April 25, professors joined students and citizens in large-scale protests outnumbering soldiers and police, who refused to attack the protestors. On April 26, 1960, Rhee stepped down from power, and Lee Ki-poong was blamed for most of the corruption in the government. The following day, the Minister of Interior Choi In-Kyu and the Chief of Security resigned taking responsibility for
15300-405: The diagnosis and characterisation of myocardial infarction. Tests such as chest X-rays can be used to explore and exclude alternate causes of a person's symptoms. Echocardiography may assist in modifying clinical suspicion of ongoing myocardial infarction in patients that can't be ruled out or ruled in following initial ECG and Troponin testing. Myocardial perfusion imaging has no role in
15450-616: The diagnostic accuracy of troponin testing is improving over time. One high-sensitivity cardiac troponin can rule out a heart attack as long as the ECG is normal. Other tests, such as CK-MB or myoglobin , are discouraged. CK-MB is not as specific as troponins for acute myocardial injury, and may be elevated with past cardiac surgery, inflammation or electrical cardioversion; it rises within 4–8 hours and returns to normal within 2–3 days. Copeptin may be useful to rule out MI rapidly when used along with troponin. Electrocardiograms (ECGs) are
15600-484: The early 7th century. Gojoseon expanded until it controlled the northern Korean Peninsula and parts of Manchuria . Gija Joseon was purportedly founded in the 12th century BCE, but its existence and role have been controversial in the modern era. In 108 BCE, the Han dynasty defeated Wiman Joseon and installed four commanderies in the northern Korean peninsula. Three of the commanderies fell or retreated westward within
15750-414: The elderly, those with diabetes, in people who have just had surgery, and in critically ill patients. "Silent" myocardial infarctions can happen without any symptoms at all. These cases can be discovered later on electrocardiograms , using blood enzyme tests, or at autopsy after a person has died. Such silent myocardial infarctions represent between 22 and 64% of all infarctions, and are more common in
15900-412: The end of the Korean War in 1953, however, as his administration delivered limited economic and social development, while angering the public by amending the constitution to prolong his stay in power. The South Korean public widely perceived Rhee as a corrupt and authoritarian leader who used autocratic methods to maintain his rule and cronyism in the government. In December 1958, Rhee forced through
16050-475: The environment. Unchecked industrialization and urban development have resulted in deforestation and the ongoing destruction of wetlands such as the Songdo Tidal Flat. However, there have been recent efforts to balance these problems, including a government run $ 84 billion five-year green growth project that aims to boost energy efficiency and green technology. The green-based economic strategy
16200-509: The exception of the short-lived Second Republic of Korea , the country has always had a presidential system with an independent chief executive. Under its current constitution the state is sometimes referred to as the Sixth Republic of Korea . The first direct election was also held in 1948. Heart attack A myocardial infarction ( MI ), commonly known as a heart attack , occurs when blood flow decreases or stops in one of
16350-526: The first Portuguese maps of 1568 by João vaz Dourado as Conrai and later in the late 16th century and early 17th century as Corea (Korea) in the maps of Teixeira Albernaz of 1630. The Kingdom of Goryeo became first known to Westerners when Afonso de Albuquerque conquered Malacca in 1511 and described the peoples who traded with this part of the world known by the Portuguese as the Gores . Despite
16500-637: The greatest support is the Mediterranean diet . Vitamins and mineral supplements are of no proven benefit, and neither are plant stanols or sterols . Public health measures may also act at a population level to reduce the risk of myocardial infarction, for example by reducing unhealthy diets (excessive salt, saturated fat, and trans-fat) including food labeling and marketing requirements as well as requirements for catering and restaurants and stimulating physical activity. This may be part of regional cardiovascular disease prevention programs or through
16650-465: The heart is not contracting at all or so poorly that all vital organs cease to function, thus leading to death. It is also distinct from heart failure , in which the pumping action of the heart is impaired. However, an MI may lead to heart failure. Chest pain that may or may not radiate to other parts of the body is the most typical and significant symptom of myocardial infarction. It might be accompanied by other symptoms such as sweating. Chest pain
16800-410: The heart muscle ( myocardium ) caused by ischemia , the lack of oxygen delivery to myocardial tissue. It is a type of acute coronary syndrome , which describes a sudden or short-term change in symptoms related to blood flow to the heart. Unlike the other type of acute coronary syndrome, unstable angina , a myocardial infarction occurs when there is cell death , which can be estimated by measuring by
16950-441: The heart ventricles , inflammation of the heart wall following infarction, and rupture of the heart wall that can have catastrophic consequences. Injury to the myocardium also occurs during re-perfusion. This might manifest as ventricular arrhythmia. The re-perfusion injury is a consequence of the calcium and sodium uptake from the cardiac cells and the release of oxygen radicals during reperfusion. No-reflow phenomenon—when blood
17100-729: The heart, lungs , gastrointestinal tract , aorta , and other muscles, bones and nerves surrounding the chest. In addition to myocardial infarction, other causes include angina , insufficient blood supply ( ischemia ) to the heart muscles without evidence of cell death, gastroesophageal reflux disease ; pulmonary embolism , tumors of the lungs, pneumonia , rib fracture , costochondritis , heart failure and other musculoskeletal injuries. Rarer severe differential diagnoses include aortic dissection , esophageal rupture , tension pneumothorax , and pericardial effusion causing cardiac tamponade . The chest pain in an MI may mimic heartburn . Causes of sudden-onset breathlessness generally involve
17250-402: The incidence and mortality rates of myocardial infarctions. They are often recommended in those at an elevated risk of cardiovascular diseases. Aspirin has been studied extensively in people considered at increased risk of myocardial infarction. Based on numerous studies in different groups (e.g. people with or without diabetes), there does not appear to be a benefit strong enough to outweigh
17400-720: The incident, igniting the June Democratic Struggle across the country. Eventually, Chun's party, the Democratic Justice Party , and its leader, Roh Tae-woo , announced the June 29 Declaration , which included the direct election of the president. Roh went on to win the election by a narrow margin against the two main opposition leaders, Kim Dae-jung and Kim Young-sam . Seoul hosted the Olympic Games in 1988 , widely regarded as successful and
17550-666: The lungs or heart – including pulmonary edema , pneumonia, allergic reactions and asthma , and pulmonary embolus, acute respiratory distress syndrome and metabolic acidosis . There are many different causes of fatigue, and myocardial infarction is not a common cause. There is a large crossover between the lifestyle and activity recommendations to prevent a myocardial infarction, and those that may be adopted as secondary prevention after an initial myocardial infarction, because of shared risk factors and an aim to reduce atherosclerosis affecting heart vessels. The influenza vaccine also appear to protect against myocardial infarction with
17700-415: The mountainous interior. Summer can be uncomfortably hot and humid, with temperatures exceeding 30 °C (86 °F) in most parts of the country. South Korea has four distinct seasons; spring, summer, autumn and winter. Spring usually lasts from late March to early May, summer from mid-May to early September, autumn from mid-September to early November, and winter from mid-November to mid-March. Rainfall
17850-610: The myocardial infarction are coronary spasm or coronary artery dissection . The most common cause of a myocardial infarction is the rupture of an atherosclerotic plaque on an artery supplying heart muscle. Plaques can become unstable, rupture, and additionally promote the formation of a blood clot that blocks the artery; this can occur in minutes. Blockage of an artery can lead to tissue death in tissue being supplied by that artery. Atherosclerotic plaques are often present for decades before they result in symptoms. The gradual buildup of cholesterol and fibrous tissue in plaques in
18000-478: The national level, although various ministries in the executive branch also carry out local functions. The judicial branch operates at both the national and local levels. Local governments are semi-autonomous and contain executive and legislative bodies of their own. South Korea is a constitutional democracy. The constitution has been revised several times since its first promulgation in 1948 at independence. However, it has retained many broad characteristics and with
18150-470: The north and the south, the war eventually reached a stalemate. During the war, Rhee's party promoted the One-People Principle , an effort to build an obedient citizenry through ethnic homogeneity and authoritarian appeals to nationalism . The 1953 armistice , never signed by South Korea, split the peninsula along the demilitarized zone near the original demarcation line. No peace treaty
18300-419: The physician confirm a person is at high risk for Chronic Coronary Syndrome before conducting diagnostic non-invasive imaging tests to make a diagnosis, as such tests are unlikely to change management and result in increased costs. Patients who have a normal ECG and who are able to exercise, for example, most likely do not merit routine imaging. There are many causes of chest pain , which can originate from
18450-471: The plaque and act to stabilize it. A stable plaque may have a thick fibrous cap with calcification . If there is ongoing inflammation, the cap may be thin or ulcerate. Exposed to the pressure associated with blood flow, plaques, especially those with a thin lining, may rupture and trigger the formation of a blood clot (thrombus). The cholesterol crystals have been associated with plaque rupture through mechanical injury and inflammation. Atherosclerotic disease
18600-453: The police. On April 11, a fisherman in the harbor at Masan discovered the corpse of Kim Ju-yul, a student at Masan Commercial High School who disappeared during March 15 rioting. Authorities announced that an autopsy confirmed that the cause of Kim's death was drowning , but many rejected this explanation and some protesters forced their way into the hospital where his body was kept. They found that Kim's skull had actually been split by
18750-487: The presence of cardiac muscle damage. Troponins , measured through a blood test, are considered to be the best, and are preferred because they have greater sensitivity and specificity for measuring injury to the heart muscle than other tests. A rise in troponin occurs within 2–3 hours of injury to the heart muscle, and peaks within 1–2 days. The level of the troponin, as well as a change over time, are useful in measuring and diagnosing or excluding myocardial infarctions, and
18900-512: The primary cause of myocardial infarction, with other risk factors including male sex, low levels of physical activity, a past family history , obesity , and alcohol use . Risk factors for myocardial disease are often included in risk factor stratification scores, such as the Framingham Risk Score . At any given age, men are more at risk than women for the development of cardiovascular disease. High levels of blood cholesterol
19050-470: The resignation of the autocratic President Syngman Rhee. This was followed by 13 months of political instability as South Korea was led by a weak and ineffectual government. This instability was broken by the May 16, 1961, coup led by General Park Chung Hee . As president, Park oversaw a period of rapid export-led economic growth enforced by political repression . Under Park, South Korea took an active role in
19200-486: The risk of myocardial infarction, although there is not universal agreement. Dietary modifications are recommended by some national authorities, with recommendations including increasing the intake of wholegrain starch, reducing sugar intake (particularly of refined sugar), consuming five portions of fruit and vegetables daily, consuming two or more portions of fish per week, and consuming 4–5 portions of unsalted nuts , seeds , or legumes per week. The dietary pattern with
19350-429: The same day as the election results, members of the Democratic Party in the southern city of Masan launched a protest against the electoral corruption. About one thousand residents of Masan gathered in front of the Democratic Party's Masan headquarters at around 7:30 PM. Residents encountered a police presence and the city lights were blacked out. The police began shooting at protesters, who responded by throwing rocks at
19500-468: The small Progressive Party (which had received one million votes in the 1956 presidential election ) represented by Cho Bong-am , and the Democratic Party represented by Cho Pyong-ok . In July 1959, Rhee accused Cho Bong-am of being a communist, and the Progressive Party leader was subsequently imprisoned and swiftly executed. Cho Pyong-ok went to the United States for a stomach operation at
19650-525: The southeastern port city of Masan on April 11. The protests were triggered by the discovery of the body of a local high school student killed by police during demonstrations against rigged elections in March. Popular discontent had arisen due to Rhee's autocratic rule, corruption , use of violence against political opposition , and uneven development of South Korea. The Masan discovery led to large student protests in Seoul , which were violently suppressed;
19800-399: The start of daylight saving time . Women who use combined oral contraceptive pills have a modestly increased risk of myocardial infarction, especially in the presence of other risk factors. The use of non-steroidal anti inflammatory drugs (NSAIDs), even for as short as a week, increases risk. Endometriosis in women under the age of 40 is an identified risk factor. Air pollution
19950-581: The start of the Third Republic in 1963. South Korea's devastated economy began to soar under Park's leadership, recording one of the fastest rises in average GDP per capita . Despite lacking natural resources, the nation rapidly developed to become one of the Four Asian Tigers based on international trade and economic globalization , integrating itself within the world economy with export-oriented industrialization . The Fourth Republic
20100-400: The studies showing these differences had high variability. Females are less likely to report chest pain during a heart attack and more likely to report nausea, jaw pain, neck pain, cough, and fatigue, although these findings are inconsistent across studies. Females with heart attacks also had more indigestion, dizziness , loss of appetite , and loss of consciousness. Shortness of breath is
20250-583: The successful hosting of the Winter Olympics in Pyeongchang . In April 2018, Park Geun-hye was sentenced to 24 years in jail because of abuse of power and corruption. The COVID-19 pandemic has affected the nation since 2020. That same year, South Korea recorded more deaths than births, resulting in a population decline for the first time on record. In March 2022, Yoon Suk Yeol , the candidate of conservative opposition People Power Party , won
20400-568: The time was Neo-Confucianism , which was epitomized by the seonbi class: nobles who passed up positions of wealth and power to lead lives of study and integrity. Between 1592 and 1598, Japan under Toyotomi Hideyoshi launched invasions of Korea , but the advance was halted by Korean forces (most notably the Joseon Navy led by Admiral Yi Sun-sin and his renowned " turtle ship ") with assistance from righteous army militias formed by Korean civilians, and Ming dynasty Chinese troops. Through
20550-529: The total land area. South Korea has 20 national parks and popular nature places like the Boseong Tea Fields, Suncheon Bay Ecological Park , and Jirisan . About 3,000 islands, mostly small and uninhabited, lie off the western and southern coasts of South Korea. Jeju Province is about 100 kilometers (62 miles) off the southern coast of South Korea. It is the country's largest island, with an area of 1,845 square kilometers (712 square miles). Jeju
20700-519: The unification of the Three Kingdoms by Silla led to the Northern and Southern States period , in which Balhae controlled the northern parts of Goguryeo, and much of the Korean Peninsula was controlled by Later Silla . Relationships between Korea and China remained relatively peaceful during this time. Balhae was founded by a Goguryeo general and formed as a successor state to Goguryeo. During its height, Balhae controlled most of Manchuria and parts of
20850-529: The wall of the coronary arteries or other arteries, typically over decades, is termed atherosclerosis . Atherosclerosis is characterized by progressive inflammation of the walls of the arteries. Inflammatory cells, particularly macrophages , move into affected arterial walls. Over time, they become laden with cholesterol products, particularly LDL , and become foam cells . A cholesterol core forms as foam cells die. In response to growth factors secreted by macrophages, smooth muscle and other cells move into
21000-455: The world through AP . This incident shocked the nation and became the basis of a national movement against electoral corruption on April 19. Masan erupted into three days of spontaneous mass protests which led to further violent clashes with police. Rhee tried to shift the focus by claiming that communist agents were behind the Masan protests. On April 18, the protests spread to the capital, Seoul , where students from Korea University launched
21150-744: Was a highly cultural state, and invented the metal movable type printing press . After defeating the Khitan Empire, which was the most powerful empire of its time, in the Goryeo–Khitan War , Goryeo experienced a golden age that lasted a century, during which the Tripitaka Koreana was completed and significant developments in printing and publishing occurred. This promoted education and the dispersion of knowledge on philosophy, literature, religion, and science. By 1100, there were 12 universities that produced notable scholars. However,
21300-505: Was a period of forced assimilation, in which Korean language, culture, and history were suppressed. This led to the March First Movement protests in 1919 and the subsequent foundation of resistance groups in exile, primarily in China. Among the resistance groups was Provisional Government of the Republic of Korea . Towards the end of World War II , the U.S. proposed dividing the Korean peninsula into two occupation zones:
21450-636: Was appointed premier of the Democratic People's Republic of Korea in September. In October, the Soviet Union declared Kim Il Sung's government as sovereign over both the north and south. The UN declared Rhee's government as "a lawful government having effective control and jurisdiction over that part of Korea where the UN Temporary Commission on Korea was able to observe and consult" and the government "based on elections which
21600-538: Was established after the October Restoration of 1972, in which Park wielded absolute power. The Yushin Constitution declared that the president could suspend basic human rights and appoint a third of the parliament. Suppression of the opposition and human rights abuse by the government became more severe in this period. Even after Park's assassination in 1979, the authoritarian rule continued in
21750-543: Was ever signed, resulting in the two countries remaining technically at war. Approximately 3 million people died in the Korean War, with a higher proportional civilian death toll than World War II or the Vietnam War , making it one of the deadliest conflicts of the Cold War era. In addition, virtually all of Korea's major cities were destroyed by the war. In 1960, a student uprising (the " April Revolution ") led to
21900-484: Was instrumental in the dissemination of Buddhism throughout East Asia and spreading continental culture to Japan. Baekje was once a great military power on the Korean Peninsula, especially during the time of Geunchogo , but was critically defeated by Gwanggaeto the Great and declined. Silla was the smallest and weakest of the three, but used opportunistic pacts and alliances with the more powerful Korean kingdoms, and eventually Tang China , to its advantage. In 676,
22050-435: Was no longer the official name. Under Japanese rule , the two names Han and Joseon coexisted. Following the surrender of Japan , in 1945, the "Republic of Korea" was adopted as the legal English name for the new country. However, it is not a direct translation of the Korean name. As a result, the Korean name "Daehan Minguk" is sometimes used by South Koreans as a metonym to refer to the Korean ethnicity (or " race ") as
22200-533: Was observed by the Temporary Commission" in addition to a statement that "this is the only such government in Korea." Both leaders engaged in authoritarian repression of political opponents. South Korea requested military support from the United States but was denied, and North Korea's military was heavily reinforced by the Soviet Union. On June 25, 1950, North Korea invaded South Korea, sparking
22350-626: Was ruled by the Goryeo dynasty (918–1392) and the Joseon dynasty (1392–1897). The succeeding Korean Empire (1897–1910) was annexed in 1910 into the Empire of Japan . Japanese rule ended following Japan's surrender in World War II , after which Korea was divided into two zones : a northern zone , which was occupied by the Soviet Union , and a southern zone , which was occupied by
22500-493: Was sunk killing 46 South Korean sailors, allegedly by a North Korean submarine. In November 2010 Yeonpyeongdo was attacked by a significant North Korean artillery barrage, with 4 people dying. The lack of a strong response to these attacks from both South Korea and the international community (the official UN report declined to explicitly name North Korea as the perpetrator for the Cheonan sinking) caused significant anger with
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