Heart attack - Diagnosis

Tests for diagnosing heart attack include the following:
Electrocardiogram (EKG or ECG): This is the most important test to diagnosis the heart diseases by recording the electrical activity of your heart via electrodes attached to your skin. It is recorded as waves. Injured heart muscles don’t conduct the electrical impulse normally. Thus it is shows that heart attack has occurred. 

Blood tests: During a heart attack, heart muscle cells die and release proteins (Enzymes) into the bloodstream. Blood tests can measure the amount of these proteins in the bloodstream. Higher than normal levels of these proteins results in a heart attack.
Tests to detect these enzymes include the:

  • Troponin test,
  • CK-MB test (CK test)
  • Myoglobin test.

Chest x-ray: This helps the doctor to know about the abnormality in the size and shape of the heart and its blood vessels and to check for fluids in the lungs.

Coronary catheterization (angiogram): It helps to determine whether a blockage or narrowing has occurred in the coronary arteries and also to locate the exact location of the blockage or narrowing.
A liquid dye is injected into the arteries of your heart through a long, thin tube that's fed through an artery, usually in your leg or groin, to the arteries in your heart. The dye makes the arteries visible on X-ray, revealing areas of blockage.

Stress test: It is used to predict the increased risk of future heart attack. This test involves the recording of heart rate during stress condition and normal condition which gives 70-80% of accurate prediction.

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