Who invented. Defibrillator?

Bernard Lown is credited with the development of the external form of the defibrillator, a device to restart the heart muscle through the application of a low voltage shock across the heart, or externally across the chest. Lown developed the device based on US cardiologist Paul Zoll's emergency procedure that used simple AC wall current.

Alois A. Langer is credited as co-inventor of the implantable defibrillator. The actual development of the implantable ICD was pioneered at Sinai Hospital in Baltimore by a team including Michel Mirowski, Morton Mower, and William Staewen.

Defibrillation was first demonstrated in 1899 by Jean Louis Prevost and Frederic Batelli, two physiologists from University of Geneva, Switzerland. They discovered that small electric shocks could induce ventricular fibrillation in dogs, and that larger charges would reverse the condition.

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