Defibrillation is a medical procedure used to treat life-threatening cardiac dysrhythmias, specifically ventricular fibrillation (VF) and pulseless ventricular tachycardia (VT). This procedure involves delivering a dose of electric current (shock) to the heart. The shock depolarizes a critical mass of the heart muscle, terminates the arrhythmia, and allows the body's natural pacemaker to re-establish normal sinus rhythm.
