[Hypersensitive carotid sinus reflex in older patients. Incidence and significance for the diagnosis of sick sinus node].
Carotid sinus massage was performed in 100 consecutive patients over the age of 50 years: 63 showed a normal reaction and sinus bradycardia occurred in 12, whereas sinus arrest was registered in 22 and total AV block in 3. With atrial pacing only 2 patients with sick sinus syndrome could be detected. Intravenous administration of atropine did not help to identify them. We conclude that in 1/4 to 1/3 of these elderly people the sinus node reacts in a hypersensitive manner to carotid sinus massage, but this does not imply the diagnosis of sick sinus syndrome.
D000368:Aged; D000375:Aging; D001919:Bradycardia / Q000175:diagnosis; D002346:Carotid Sinus; D005260:Female; D006327:Heart Block / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011311:Pressoreceptors / Q000503:physiopathology*; D012849:Sinoatrial Node; D013577:Syndrome; D013610:Tachycardia / Q000175:diagnosis
Hypersensitiver Carotissinus-Reflex bei älteren Patienten. Häufigkeit und Bedeutung für die Diagnose kranker Sinusknoten.