PMID: 8962562Dec 1, 1996Paper

Higher sympathetic nerve activity during ventricular (VVI) than during dual-chamber (DDD) pacing

Journal of the American College of Cardiology
J A TaylorK A Ellenbogen

Abstract

We determined the short-term effects of single-chamber ventricular pacing and dual-chamber atrioventricular (AV) pacing on directly measured sympathetic nerve activity. Dual-chamber AV cardiac pacing results in greater cardiac output and lower systemic vascular resistance than does single-chamber ventricular pacing. However, it is unclear whether these hemodynamic advantages result in less sympathetic nervous system outflow. In 13 patients with a dual-chamber pacemaker, we recorded the electrocardiogram, noninvasive arterial pressure (Finapres), respiration and muscle sympathetic nerve activity (microneurography) during 3 min of underlying basal heart rate and 3 min of ventricular and AV pacing at rates of 60 and 100 beats/min. Arterial pressure was lowest and muscle sympathetic nerve activity was highest at the underlying basal heart rate. Arterial pressure increased with cardiac pacing and was greater with AV than with ventricular pacing (change in mean blood pressure +/- SE: 10 +/- 3 vs. 2 +/- 2 mm Hg at 60 beats/min; 21 +/- 5 vs. 14 +/- 2 mm Hg at 100 beats/min; p < 0.05). Sympathetic nerve activity decreased with cardiac pacing and the decline was greater with AV than with ventricular pacing (60 beats/min -40 +/- 11% vs. -...Continue Reading

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Citations

Sep 24, 1999·Clinical Cardiology·P Davey, J Bateman
Jun 29, 2011·Current Treatment Options in Cardiovascular Medicine·Simon ModiRaymond Yee
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Apr 24, 2004·The Cochrane Database of Systematic Reviews·J DretzkeR Taylor

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