Ventricular tachycardia is a common cardiac arrhythmia, the main causes are as follows: First, it can be seen in patients without organic heart disease, purely manifested as ventricular tachycardia, in most cases the duration is relatively short, and there are no clinical symptoms, which will not increase the risk of sudden death. Secondly, ventricular tachycardia after organic heart disease, such as coronary heart disease after myocardial infarction, dilated cardiomyopathy, heart failure, can be treated with amiodarone and lidocaine, and electrical cardioversion needs to be applied if it causes a progressive drop in blood pressure. Third, genetically related ventricular tachycardia, such as long QT interval syndrome, Brugada syndrome, if the ventricular tachycardia repeated episodes and thus cause the patient repeated syncope, need to implant cardioverter defibrillator.