An electrocardiogram (EKG or ECG) is a test that checks for problems with the electrical activity of your heart. An EKG translates the Reference heart's electrical activity into line tracings on paper. The spikes and dips in the line tracings are called waves. See a picture of the Reference EKG components and intervals Opens New Window Reference Opens New Window.
The heart is a muscular pump made up of Reference four chambers Opens New Window Reference Opens New Window. 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. See a picture of the Reference heart and its electrical system Opens New Window Reference Opens New Window.
|By:||Reference Healthwise Staff||Last Revised: Reference September 11, 2012|
|Medical Review:||Reference Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology
Reference George Philippides, MD - Cardiology