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Heart Attack and Unstable Angina - Exams and Tests

Emergency testing for a heart attack

After you call 911 for a heart attack, paramedics will quickly assess your heart rate, blood pressure, and breathing rate. They also will place electrodes on your chest for an electrocardiogram (EKG, ECG) to check your heart's electrical activity.

When you arrive at the hospital, the emergency room doctor will take your history and do a physical exam, and a more complete ECG will be done. A technician will draw blood to test for cardiac enzymes, which are released into the bloodstream when heart cells die.

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If your tests show that you are at risk of having or are having a heart attack, your doctor will probably recommend that you have cardiac catheterization. The doctor can then see whether your coronary arteries are blocked and how your heart functions.

If an artery appears blocked, angioplasty—a procedure to open up clogged arteries—may be done during the catheterization. Or you will be referred to a cardiovascular surgeon for coronary artery bypass graft surgery.

If your tests do not clearly show a heart attack or unstable angina and you do not have other risk factors (such as a previous heart attack), you will probably have other tests. These may include a cardiac perfusion scan or SPECT imaging test.

If your tests do not show signs of a heart attack but your doctor thinks you have unstable angina and may be in danger of having a heart attack, you will be admitted to the hospital.

Testing after a heart attack

From 2 to 3 days after a heart attack or after being admitted to the hospital for unstable angina, you may have more tests. (Even though you may have had some of these tests while you were in the emergency room, you may have some of them again.)

Doctors use these tests to see how well your heart is working and to find out whether undamaged areas of the heart are still receiving enough blood flow.

These tests may include:

    This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http:// cancer .gov or call 1-800-4-CANCER.

    WebMD Medical Reference from Healthwise

    Last Updated: March 12, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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