The Science Behind Defibrillators: A Detailed Explanation
Defibrillators don’t “restart” the heart—they reset electrical chaos. This article explains the science behind defibrillation, from cardiac electrical activity and ventricular fibrillation to the physics of voltage, current, joules, and biphasic waveforms. Written from a biomedical engineering perspective, it clarifies how defibrillators work at a cellular level and why timely shock therapy saves lives.