title: Sinus nodal echoes. Clinical case report and canine studies.
mesh_terms: D000818:Animals; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D004285:Dogs; D004558:Electric Stimulation; D004562:Electrocardiography; D004594:Electrophysiology; D006801:Humans; D012032:Refractory Period, Electrophysiological; D012849:Sinoatrial Node / Q000503:physiopathology*; D014630:Vagus Nerve / Q000502:physiology