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Termination of both atrial fibrillation (AF) and ventricular fibrillation (VF) by 41 joule shock. Telemetry demonstrates appropriate detection of ventricular fibrillation with resultant delivery of 41 joule shock (arrow), which terminates both arrhythmias. AS = atrial sense; PVC = premature ventricular complex VS = ventricular sense; VT = ventricular tachycardia.
