Electrocardiogram

ECG (Electrocardiogram), EKG (Electrocardiogram)

Test Overview

An electrocardiogram (EKG or ECG) is a test that checks for problems with the electrical activity of your heart. An EKG translates the heart's electrical activity into line tracings on paper. The spikes and dips in the line tracings are called waves. See an illustration of the EKG components and intervals.

The heart is a muscular pump made up of four chambers. The two upper chambers are called atria, and the two lower chambers are called ventricles. A natural electrical system causes the heart muscle to contract and pump blood through the heart to the lungs and the rest of the body.

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Author:	Sydney Youngerman-Cole, RN, BSN, RNC	Last Updated: April 21, 2006
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine George Philippides, MD - Cardiology
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