EKGs evaluate the electrical activity generated by the heart at rest and with activity. This test is administered to patients who may be at risk because of family history of heart disease, or because they have other risk factors such as being a smoker, are overweight, or have diabetes, high cholesterol or high blood pressure. In this test, patches with wires (electrodes) are attached to the chest area to measure the electrical impulses given off by the heart. Impulses are recorded as waves displayed on a monitor or printed on paper.
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