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Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Acute Coronary Syndrome

Acute coronary syndrome (ACS) is an event that occurs when part of the heart muscle is not getting enough blood and oxygen. ACS includes unstable angina and a heart attack. In a heart attack, the heart muscle is injured or starts to die. ACS is an emergency.

ACS is most often caused by a narrowed or blocked coronary artery. The coronary arteries supply blood to the heart muscle. The narrowing or blockage is usually the result of coronary artery disease, in which fatty deposits called plaque (say "plak") build up inside the arteries. If the plaque breaks open or ruptures, a blood clot may form and limit or block blood flow to the heart muscle.

Current as of: July 31, 2024

Author: Ignite Healthwise, LLC Staff

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All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.