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An electrocardiogram (EKG or ECG) measures your heart’s electrical activity by placing small electrodes with adhesive pads to the skin of your chest, arms and legs. The test takes only a few minutes and is simple, safe and painless. An EKG measures your heart rhythm (fast, slow or irregular), detects inadequate blood flow to the heart, and identifies heart abnormalities, such as enlarged chambers or a heart defect. It can also confirm a heart attack, past or present.
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