The role of autonomic chronotropic influences in patients with the sick sinus syndrome.
D000328:Adult; D000368:Aged; D001283:Atrioventricular Node / Q000503:physiopathology*; D001341:Autonomic Nervous System / Q000503:physiopathology*; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D012804:Sick Sinus Syndrome / Q000145:classification / Q000503:physiopathology*