An electrocardiogram (EKG or ECG) is a recording of the heart's electrical activity as a graph or series of wave lines on a moving strip of paper. This gives the physician important information about the heart. For example, it can show the heart's rate and rhythm. It can also show an enlargement of the heart or the presence of either current or past heart attacks.
EKGs are noninvasive, quick, safe, painless and inexpensive tests that are routinely done if a heart condition is suspected.
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