1 ene 1951 año - John Alexander Hopps developed the worlds first external artificial pacemaker in 1951 at the University of Toronto

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John Alexander Hopps developed the worlds first external artificial pacemaker in 1951 at the University of Toronto. It was used to successfully paced a dog's heart. This pacemaker needed to be plugged into power points. Hopps' work led to the use of cardiac pacemakers in humans and helped establish the importance of electronic devices in medicine.

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