Angina pectoris, commonly known as angina, is chest pain due to heart muscle disease, generally due to obstruction or spasm of the coronary arteries. Unstable angina is defined by angina, which changes or worsens. There are at least one of these three characteristics: It takes place elsewhere, usually lasts longer than 10 minutes. This is a serious and new onset i.e before 4-6 weeks and shows a flagship model, apparently more serious, prolonged or frequent than previously.
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