An Electrocardiography (ECG) is a recording of the heart’s electrical activity over a short period of time by means of skin electrodes.
The ECG test is useful as a screening test to detect abnormal heart rhythm, previous heart attack or an enlarged weakened heart. It is a useful screening test as a baseline, especially for persons with underlying disease like hypertension, diabetes and high cholesterol.
An abnormal ECG should be followed up with a cardiologist. Further tests like an exercise treadmill test, 2D-echocardiogram, calcium scoring, or even an angiogram may be necessary.