Fibrillation (ventricular)

Cardiac arrhythmia characterized by the rapid, incomplete, and uncoordinated contractions of the muscle fibers of ventricles of the heart. Can lead to cardiac arrest.

An arrhythmia in which the walls of the ventricle of the heart quiver rather than beat regularly. This causes an interruption of the flow of blood and lack of oxygen to the brain, possibly resulting in death.

A serious heart condition where the ventricular muscles flutter and the heart no longer beats.