title: Sinus node function; evaluation in patients with and without sinus node disease.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001919:Bradycardia / Q000503:physiopathology; D004562:Electrocardiography; D004594:Electrophysiology; D006339:Heart Rate; D006801:Humans; D008405:Massage; D009206:Myocardium / Q000166:cytology; D010138:Pacemaker, Artificial; D010275:Parasympathetic Nervous System / Q000502:physiology; D005082:Physical Exertion; D011817:Rabbits; D012849:Sinoatrial Node / Q000187:drug effects / Q000502:physiology* / Q000503:physiopathology; D013610:Tachycardia / Q000503:physiopathology; D014636:Valsalva Maneuver
chemical_list: D001285:Atropine