Sinus node reentry. An in vivo demonstration in the dog.
D000818:Animals; D001146:Arrhythmia, Sinus / Q000503:physiopathology; D001281:Atrial Fibrillation / Q000503:physiopathology; D005117:Cardiac Complexes, Premature / Q000503:physiopathology; D004285:Dogs; D004558:Electric Stimulation; D004562:Electrocardiography; D006325:Heart Atria; D008839:Microelectrodes; D010138:Pacemaker, Artificial; D012849:Sinoatrial Node / Q000502:physiology* / Q000503:physiopathology; D014630:Vagus Nerve / Q000502:physiology