Parasystole arising in the accessory pathway.
D000328:Adult; D001145:Arrhythmias, Cardiac / Q000175:diagnosis; D001281:Atrial Fibrillation / Q000175:diagnosis; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D008297:Male; D009200:Myocardial Contraction; D013577:Syndrome; D013599:Systole; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis