The atrial pacemaking site after surgical exclusion of the sinoatrial node.
D000818:Animals; D001145:Arrhythmias, Cardiac / Q000209:etiology; D004285:Dogs; D004562:Electrocardiography; D004567:Electrodes, Implanted; D006329:Heart Conduction System / Q000502:physiology*; D006339:Heart Rate; D012849:Sinoatrial Node / Q000502:physiology*; D013997:Time Factors