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The coronary arteries supply oxygen-rich blood to the heart muscle. If these arteries are narrowed or blocked, the heart does not get enough oxygen. This can cause angina or a heart attack.
Any type of acute coronary syndrome is very serious and needs to be treated right away.
Acute coronary syndrome happens because plaque narrows or blocks the arteries that supply blood to the heart. Plaque is made of cholesterol and other things. Over time, plaque can build up in the arteries. This is known as coronary artery disease.
Plaque causes angina by narrowing the arteries. A heart attack happens when a piece of plaque breaks open and a clot forms, blocking an artery.
Call 911 or other emergency services immediately if you have symptoms of acute coronary syndrome. These may include:
After you call 911, the operator may tell you to chew 1 adult-strength or 2 to 4 low-dose aspirin. Wait for an ambulance. Do not try to drive yourself.
A doctor will give you a physical exam and ask about your symptoms and past health. He or she also will ask about your family's health. You will have several tests to find out what is causing your chest pain.
An electrocardiogram can show whether you have angina or have had a heart attack. This test measures the electrical signals that control your heart's rhythm. Small pads will be taped to your chest and other areas of your body. They connect to a machine that traces the signals onto paper. The doctor will look for certain changes on the graph to see if your heart is not getting enough blood or if you are having a heart attack.
A blood test will look for a rise in cardiac enzymes. The heart releases these substances when it is damaged.
In some cases, you might have a test called a cardiac perfusion scan to see if your heart is getting enough blood. It also can be used to check for areas of damage after a heart attack.
If you call 911, treatment will start in the ambulance with aspirin and other medicines.
In the hospital, the doctor will work right away to return blood flow to your heart. You may get medicines to break up and prevent blood clots. You may get nitroglycerin and other medicines that make your arteries wider. This helps to ease pain and improve blood flow. You also will get oxygen and pain medicine.
Your test results will help your doctor decide about more treatment. If you are having a heart attack, you likely will get medicines to break up clots or have angioplasty (usually with stents) or bypass surgery to improve blood flow to your heart. If you are having unstable angina, you will likely get medicines but you might also have angioplasty with stents.
After you get out of the hospital, you will continue to take medicines such as beta-blockers to help your heart. You will likely take aspirin and also may take other medicines that prevent blood clots. You probably also will take medicines to keep your cholesterol and blood pressure at normal levels.
Heart disease can lead to acute coronary syndrome. If you do not have heart disease, you may be able to prevent it with a healthy lifestyle:
People who already have heart disease usually take several medicines to lower the chance of a heart attack. These may include daily low-dose aspirin and medicines to lower cholesterol and blood pressure. People who have heart disease also are encouraged to eat a healthy diet, get daily exercise, and not smoke. These steps may prevent a heart attack or stroke.
|American Heart Association (AHA)|
|7272 Greenville Avenue|
|Dallas, TX 75231|
Visit the American Heart Association (AHA) website for information on physical activity, diet, and various heart-related conditions. You can search for information on heart disease and stroke, share information with friends and family, and use tools to help you make heart-healthy goals and plans. Contact the AHA to find your nearest local or state AHA group. The AHA provides brochures and information about support groups and community programs, including Mended Hearts, a nationwide organization whose members visit people with heart problems and provide information and support.
CardioSmart is an online education and support program that can be your partner in heart health. This website engages, informs, and empowers people to take part in their own care and to work well with their health care teams. It has tools and resources to help you prevent, treat, and/or manage heart diseases.
You can set health and wellness goals and track your progress with online tools. You can track your weight, waist measurement, blood pressure, and activity. You can use calculators to help you find your body mass index (BMI) and check your risk for heart problems. You can search for a cardiologist. And you can find medicine information and prepare for your next appointment. Also, you can join online communities to connect with peers and take heart-healthy challenges.
CardioSmart was designed by cardiovascular professionals at the American College of Cardiology, a nonprofit medical society. Members include doctors, nurses, and surgeons.
|National Heart, Lung, and Blood Institute (NHLBI)|
|P.O. Box 30105|
|Bethesda, MD 20824-0105|
The U.S. National Heart, Lung, and Blood Institute (NHLBI) information center offers information and publications about preventing and treating:
Other Works Consulted
- Antman EM (2012). ST-elevation myocardial infarction: Pathology, pathophysiology, and clinical features. In RO Bonow et al., eds., Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 9th ed., vol. 2, pp. 1087–1110. Philadelphia: Saunders.
- Jneid H, et al. (2012). 2012 ACCF/AHA Focused update of the guideline for the management of patients with unstable angina/non-ST-elevation myocardial infarction. Circulation, 126(7): 875–910.
- Kim MC, et al. (2011). Definitions of acute coronary syndromes. In V Fuster et al., eds., Hurst's the Heart, 13th ed., vol. 2, pp. 1287–1295. New York: McGraw-Hill.
- O'Connor RE, et al. (2010). Acute coronary syndromes: 2010 American Heart Association guidelines for cardiopulmonary resuscitation and emergency cardiovascular care. Circulation, 122(18): S787–S817.
- Sarkees ML, Bavry AA (2010). Non ST-elevation acute coronary syndrome, search date December 2009. BMJ Clinical Evidence. Available online: http://www.clinicalevidence.com.
- Thygesen K, et al. (2012). Third universal definition of myocardial infarction. Circulation, 126(16): 2020–2035. Also available online: http://circ.ahajournals.org/content/126/16/2020.
|Primary Medical Reviewer||Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology|
|Specialist Medical Reviewer||Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology|
|Last Revised||February 13, 2013|
Last Revised: February 13, 2013
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