Parasystole.
D000200:Action Potentials; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology; D001283:Atrioventricular Node / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006339:Heart Rate; D006801:Humans; D008297:Male; D008564:Membrane Potentials; D008875:Middle Aged; D011690:Purkinje Fibers / Q000503:physiopathology; D012849:Sinoatrial Node / Q000503:physiopathology