title: Sinus node dysfunction: new concepts and evaluation of patients with suspected sick sinus syndrome.
mesh_terms: D000368:Aged; D001283:Atrioventricular Node / Q000503:physiopathology; D001285:Atropine / Q000494:pharmacology; D002036:Bundle of His / Q000503:physiopathology; D004562:Electrocardiography; D004594:Electrophysiology; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008875:Middle Aged; D008991:Monitoring, Physiologic; D011433:Propranolol / Q000494:pharmacology; D011690:Purkinje Fibers / Q000503:physiopathology; D012804:Sick Sinus Syndrome / Q000175:diagnosis / Q000503:physiopathology* / Q000628:therapy; D012849:Sinoatrial Node / Q000187:drug effects / Q000503:physiopathology*
chemical_list: D001285:Atropine; D011433:Propranolol