Comparison of atrial and ventricular drive on sinus nodal function in the dog.
D000818:Animals; D001794:Blood Pressure; D004285:Dogs; D006325:Heart Atria; D006339:Heart Rate; D010138:Pacemaker, Artificial; D012849:Sinoatrial Node / Q000502:physiology*; D013564:Sympathetic Nervous System / Q000502:physiology; D013997:Time Factors; D014628:Vagotomy