Copyright © 1984 by the European Society of Cardiology.
© 1984 The European Society of Cardiology
Baroreflex modulation of ventricular rhythm in atrial fibrillation

*Department of Physiology, University of Amsterdam Amsterdam
Department of Cardiology, University Hospital Utrecht Utrecht, The Netherlands
Received 16 March 1984; revised 20 August 1984; .
Address for Correspondence cnd reprints: Dr C. Borst, University Hospital Utrecht, Department of Cardiology, Catharijnesingel 101, 3511 GV Utrecht, The Netherlands.
Abstract
The influence of bilateral carotid sinus nerve stimulation was studied in a patient with atrial fibrillation. Stimulation resulted after approximately 1.5 s in abrupt prolongation of the minimum, median and maximum RR-interval, and in greater RR-interval dispersion. Virtually no change was observed in the random character of the ventricular rhythm. The absence of demonstrable baroreflex modulation of the ventricular rhythm in atrial fibrillation is probably due to the relatively long latency of the reflex effect on atrioventricular conduction in relation to the duration of the RR-intervals.
Key Words: Atrial fibrillation baroreceptor reflex atrioventricular conduction
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