Ventricular tachycardia occurs in myocardial ischemia, severe electrolyte disorders, and acute heart failure. 1. Myocardial ischemia: an acute attack of myocardial ischemia will lead to insufficient blood supply to the myocardium, and the site of ischemia may have abnormal electrical activity, which will trigger the patient to experience ventricular tachycardia. 2. Severe electrolyte disorders: Blood potassium and blood magnesium have a greater impact on arrhythmia. Patients with severe hypokalemia or hypokalemia will lead to extreme instability of the heart’s electrical activity, which can induce ventricular tachycardia episodes. 3. Acute heart failure: In acute heart failure, cardiac function will be severely reduced, and patients will suffer from severe hypoxia, accompanied by impaired cardiac function, which can also lead to ventricular tachycardia. There are many other causes of ventricular tachycardia, such as oral intake of certain drugs, acid-base imbalance, etc. Patients with ventricular tachycardia should go to the hospital in time, and be given emergency treatment under the guidance of a physician to prevent sudden death.