The difference between ventricular tachycardia and ventricular fibrillation lies in the different presentation of the two on the ECG. Ventricular tachycardia is a tachycardia of the ventricles, while ventricular fibrillation is, as the name implies, ventricular fibrillation, usually characterized by regular wide, QRS complex waves on the ECG for ventricular tachycardia and irregular miscellaneous waves on the ECG for ventricular fibrillation, which can be easily distinguished by an experienced cardiologist. If ventricular fibrillation occurs, the patient’s pulse is usually not palpable and blood pressure decreases, and cardiogenic convulsions are more likely to occur, which may occur if the ventricular tachycardia is prolonged. If ventricular fibrillation is not treated promptly, it can be life-threatening and can be treated with electrical resuscitation or, if that is not possible, boxing resuscitation and cardiopulmonary resuscitation. In terms of risk, ventricular fibrillation is more dangerous than ventricular tachycardia, and if ventricular fibrillation progresses further it can lead to cardiac arrest and the patient can die.