The common causes of ventricular tachycardia are as follows: 1, organic heart lesions: the main cause of ventricular tachycardia, commonly seen in coronary artery disease with cardiac insufficiency, dilated cardiomyopathy or severe myocarditis; 2, non-organic heart lesions: such as Q-T interval prolongation syndrome, etc.; 3, drug factors: such as digitalis toxicity, antidepressant tricyclic drugs, anti-arrhythmic drugs, etc.; 4, electrolyte disorders: such as low blood potassium, low blood magnesium, etc.; 5, cardiac surgery or cardiac intervention: such as coronary artery disease or heart attack patients, after cardiac stent surgery, ventricular tachycardia may occur.