<prompt> A young patient sustains cardiac arrest, in the medical ward. Immediate defibrillation is advised when the ECG shows:Ventricular TachycardiaAsystoleElectromechanical dissociationPersistant Bradyarrhythmia  <response>: Answer is A Ventricular Tachycardia Defibrillation is indicated when cardiac arrest occurs secondary to ventricular fibrillation or pulseless ventricular tachycardia shockable rhythms 