The principle of electrical cardioversion: Instantaneous (millisecond-level) high voltage and powerful external force are used to instantly depolarize all myocardial cells in the heart, eliminating the original malignant (fatal) arrhythmia, and then the heart returns to normal. The pacemaker at the highest rhythm controls the heart by firing impulses.
During electrical cardioversion, the adjustable parameter is energy, and 360 refers to 360 joules, not voltage. The voltage during electrical cardioversion ranges from several hundred volts to about 2,000 volts, and the products of different manufacturers are different.
The common cause of death from electric shock is that normal people will develop malignant arrhythmia and a strong thermal effect due to the relatively long exposure time. Medical electrical cardioversion is an instantaneous high voltage. In some cases, a specific time in the heartbeat cycle is selected to reduce the adverse impact on the heart, so it will not cause death.