An electrocardiogram (EKG, ECG) is a test that measures the
electrical signals that control heart rhythm. The test measures how electrical
impulses move through the heart muscle as it contracts and relaxes.
The electrocardiogram translates the heart's
electrical activity into line tracings on paper. The spikes and dips in the
line tracings are called waves.
March 7, 2012
Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology & George Philippides, MD - Cardiology
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