title: Fluctuations of the atrial cycle length and A-V delay with a universal (DDD) pacemaker.
abstract: The electronic characteristics of a new universal (DDD) pulse generator can result in significant shortening of the atrial cycle length (A-A interval) and shortening of the atrioventricular (A-V) interval beyond the programmed values. These pacemaker arrhythmias are entirely compatible with normal function and must not be interpreted as malfunctions.
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D016275:Atrial Function; D001283:Atrioventricular Node / Q000502:physiology*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial