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Europace Advance Access published online on August 1, 2007
Europace, doi:10.1093/europace/eum148
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© The European Society of Cardiology 2007. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

CLINICAL INVESTIGATION

Prevalence of positive carotid sinus massage and related risk of syncope in patients with Alzheimer's disease

Philippe Bordier*, Marina Colsy, Frederic Robert and Ghalia Bourenane

Hopital Cardiologique du Haut-Leveque Avenue de Magellan 33604 Pessac cedex, France

Aims The prevalence of positive carotid sinus massage (CSM) in asymptomatic elderly persons and related risk of syncope are poorly known.

Methods and results We examined the ability of CSM to predict the risk of profound bradycardia or syncope in 30 patients with Alzheimer's disease (AD) and no history of syncope, before treatment with cholinesterase inhibitors. Carotid sinus massage was repeated at 1, 2 and 8 months after onset of cholinergic therapy. The long-term incidence of syncope was observed over a 20-month follow-up. Among the study patients (mean age=80±6 years, 83% women), 10 had positive CSM, with prolonged ventricular standstill in two of them (6.7%). The response to CSM was not predictive of an increased risk in bradycardia-mediated syncope, though syncope occurred in three patients during long-term follow-up, related to orthostatic hypotension in one and to undetermined causes in the others. Cholinergic therapy in all patients, or drugs that slow cardiac conduction, administered to 40% of the responders to CSM and 45% of the non-responders, or the presence of a bundle branch block did not affect the response to CSM or incidence of syncope.

Conclusions A positive CSM was (i) observed in 30% of elderly persons with AD and no history of syncope, and (ii) not predictive of an increased risk of bradycardia-mediated syncope.

Key Words: Carotid sinus massage, Syncope, Ageing, Cholinesterase inhibitor

* Corresponding author. Tel: +33 6 0770 1661; fax: +33 5 5604 3849. E-mail address: phibordier{at}aol.com

Manuscript submitted 31 March 2007. Accepted after revision 29 June 2007.


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