What does Arrhythmias, ventricular mean?

Arrhythmias, ventricular meaning in Medical Dictionary

irregular rapid heart rhythms (arrhythmias) that originate when you look at the reduced chambers of this heart (the ventricles). Ventricular arrhythmias consist of ventricular tachycardia and ventricular fibrillation. Both are life threatening arrhythmias mostly related to cardiac arrest or scarring regarding the heart muscle mass from previous stroke.