For treatment of unstable tachyarrhythmia (with chest pain, dyspnea, pulmonary edema, altered mental status), other than VF or pulselessVT, synchronized<unk>  should be warranted.In Synchronized<unk>   the amount of energy delivered is less than defibrillation and also the shock is delivered in different parts of the cardiac cycle. R-on -T phenomena may happen if the<unk>  defibrillated shock is delivered during the refractory period (on the latter part of T wave) which is vulnerable to induce VF. For prevention of this phenomena and monitoring R wave for each QRS complex for delivery of shock in cardiac cycle, the defibrillator is placed on synchronize mode. The recommendation energy for synchronized<unk>  is 50-200 jouls.
Ventricular tachycardia electrical cardioversion
Atrial fibrillation electrical cardioversion
Atrial fibrillation pharmacological cardioversion
Atrial fibrillation cardioversion
AVNRT vagal maneuvers
Wolff-Parkinson-White syndrome cardioversion
AVNRT cardioversion
Catecholaminergic polymorphic ventricular tachycardia implantable cardioverter-defibrillator