Electrocardiography is the process of producing an electrocardiogram. It is a graph of voltage versus time of the electrical activity of the heart using electrodes placed on the skin.

What does an ECG test for?

An electrocardiogram (ECG) is a simple test that can be used to check your heart's rhythm and electrical activity. Sensors attached to the skin are used to detect the electrical signals produced by your heart each time it beats.

Can ECG detect heart attack?

Wires from the electrodes are connected to the ECG machine, which records the electrical impulses. An ECG is important because: it helps confirm the diagnosis of a heart attack. it helps determine what type of heart attack you have had, which will help determine the most effective treatment.