The sinus node electrogram in patients with and without sick sinus syndrome: techniques and correlation between directly measured and indirectly estimated sinoatrial conduction time.
D000368:Aged; D002304:Cardiac Pacing, Artificial; D002346:Carotid Sinus; D004562:Electrocardiography; D004594:Electrophysiology / Q000379:methods; D006801:Humans; D008405:Massage; D008875:Middle Aged; D012804:Sick Sinus Syndrome / Q000175:diagnosis / Q000503:physiopathology* / Q000628:therapy; D012848:Sinoatrial Block / Q000209:etiology; D012849:Sinoatrial Node / Q000502:physiology*; D013997:Time Factors