How does the electrocardiogram (ECG) help patient care?

How does the electrocardiogram (ECG) help patient care?

Electrocardiogram records the electrical activity of the heart. It shows various abnormalities with different types of heart disease. The most important role of an electrocardiogram is in the confirmation of a heart attack. The test is widely available even in small hospitals and is quite inexpensive, compared to all other tests for heart disease. Hence it is quite useful for the patient and the doctor.