Ventricular Tachycardia (VT) is a clinical challenge for medical personnels. Even though the algorithm regarding management of tachycardia has been established, VT might progress to Electrical Storm (ES) despite adequate medical or electrical interventions. Critical complications such as cardiogenic shock or eventually cardiac arrest occur if the ES could not be stopped in a moment. Double Sequential External Defibrillation (DSED) might be an alternative solution for refractory Ventricular Fibrillation (VF) storms, which also could be applied on those with refractory ventricular tachycardia.