Apr 6, 2014
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Apparatus that delivers a controlled electric shock to restore normal heart rhythm in patients whose hearts have developed VENTRICULAR FIBRILLATION or have stopped beating. The shock is delivered by electrodes placed on the chest wall or directly to the heart after the chest has been surgically opened. Defibrillators are a standard item of equipment for paramedical staff in ambulances, and aeroplanes of some airlines now routinely carry the apparatus. (See also HEART, DISEASES OF.)

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Medical Dictionary

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