- Definition: Electrocardiogram (EKG or ECG)
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An electrocardiogram is a recording of the electrical activity of the heart using electrodes applied to the arms, legs, and chest. The EKG can provide important information about the patient's heart rhythm, a previous heart attack, increased thickness of heart muscle, signs of decreased oxygen delivery to the heart, and problems with conduction of the electrical current from one portion of the heart to another. The test is very safe and can be done in a doctor’s office.
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