Electrical storms, also known as ventricular arrhythmia storms, malignant arrhythmia storms, and catecholamine storms, were standardized in 2009 by the European and American Cardiovascular Society and the Arrhythmia Society for ventricular electrical storms, which are malignant ventricular arrhythmias (including ventricular tachycardia and or ventricular fibrillation resulting in hemodynamic changes) requiring antiarrhythmic drug therapy, electrical acute critical syndromes that require antiarrhythmic drug therapy, electrical diversion, or electrical defibrillation management. The most recent consensus mechanisms for the development of electrical storms include: (1) sympathetic overactivation; (2) increased myocardial β-receptor responsiveness; and (3) abnormalities of the intramyocardial Hippocampal conduction system. These points are currently considered to be the mechanisms by which electrical storms occur.