Which medical device, first commercially introduced in 1965 by Dr. Frank Pantridge in Belfast, revolutionized emergency cardiac care by allowing defibrillation outside of hospitals?

Test your knowledge of transformative medical products! Throughout history, certain healthcare innovations have revolutionized how we deliver emergency care. One particular product, developed in the late 1950s, fundamentally changed how medical professionals respond to cardiac emergencies and has saved countless lives worldwide. Can you identify this groundbreaking device from its origin story and initial application? This question explores the intersection of medical innovation, brand history, and emergency medicine evolution.

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The portable defibrillator (initially by Physio-Control)
The implantable pacemaker (initially by Medtronic)
The automated external ventilator (initially by Puritan Bennett)
The portable ECG monitor (initially by Hewlett-Packard)