Electrocardiograms: Clinical Cardiology
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Electrocardiograms: Clinical Cardiology

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Electrocardiography (ECG) is the technique by virtue of which the electrical activity of the heart is measured and recorded over a period of time. Electrodes placed over the skin detect electrical changes arising due to the electrophysiological pattern of depolarizing and repolarizing of the heart during each heart beat. The voltage versus time graph obtained through this procedure is called an electrocardiogram. It is examined to detect any suspected myocardial infarction, perceived arrhythmia, known cardiac arrhythmias, suspected pulmonary embolism, etc. It can also be done for cardiac stres...