![]() Often occurs while you may be resting, sleeping, or with little physical exertion.Learn more about excessive blood clotting. Blood clots may form, partially dissolve, and later form again and angina can occur each time a clot blocks blood flow in an artery. Causes of Unstable Angina:īlood clots that block an artery partially or totally are what causes unstable angina. Learn about an unstable form of angina called Prinzmetal angina. You could be having a heart attack which puts you at increased risk for severe cardiac arrhythmias or cardiac arrest, which could lead to sudden death. If you have new, worsening or persistent chest discomfort, you need to go to the ER. Unstable angina should be treated as an emergency. Unstable angina or sometimes referred to as acute coronary syndrome causes unexpected chest pain, and usually occurs while resting. The most common cause is reduced blood flow to the heart muscle because the coronary arteries are narrowed by fatty buildups ( atherosclerosis) which can rupture causing injury to the coronary blood vessel resulting in blood clotting which blocks the flow of blood to the heart muscle. ![]() National Hypertension Control Initiative.Pets and Your Health / Healthy Bond for Life.
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