Common ventricular arrhythmias mainly include premature ventricular contractions, ventricular tachycardia, ventricular flutter, and ventricular fibrillation. Premature ventricular contractions appear on the electrocardiogram as prematurely occurring wide and abnormal QRS complexes. If asymptomatic, no treatment is needed; if symptomatic, receptor blockers can be used for treatment. Ventricular tachycardia is clearly indicated on the electrocardiogram by wide and abnormal QRS complexes, with heart rates ranging from 140 bpm to 200 bpm. The primary treatment is to remove the cause, and electrical cardioversion can be used when hemodynamics are unstable. Ventricular flutter and fibrillation, their ventricular rates are generally above 250 bpm, and treatment is crucial.