Ventricular arrhythmias mainly refer to disorders of the ventricular rhythm and are relatively common clinically, including premature ventricular contractions, ventricular tachycardia, ventricular flutter, and ventricular fibrillation. Premature ventricular contractions generally do not cause noticeable clinical symptoms, while ventricular flutter and ventricular fibrillation are very dangerous clinically and must be treated promptly with defibrillation. Therefore, ventricular arrhythmias must be treated promptly, actively treating the underlying disease, and managing the arrhythmia to prevent sudden death.