Ventricular fibrillation is one type of arrhythmia that can be deadly. It occurs when the heart beats with rapid, erratic electrical impulses. This causes pumping chambers in your heart (the ventricles) to quiver uselessly instead of pumping blood.
A VOLTAGE REGULATOR regulates the charging voltage that the alternator produces, keeping it between 13.5 and 14.5 volts to protect the electrical components throughout the vehicle. There is also a system to warn the driver if something is not right with the charging system.
This also ensure electrical components, such as incandescent lights or semiconductors, operate at acceptable voltages. The key to this ideal behavior is actually the voltage regulator and how the voltage regulator is connected into the system. Of course the alternator has to turn at a normal operating speed, which is set by pulley ratio and engine speed range, but the regulator remains key to stable running voltage as the load changes.