Document Detail

The effect of posture on the response to atrioventricular synchronous pacing in patients with underlying cardiovascular disease.
MedLine Citation:
PMID:  1712948     Owner:  NLM     Status:  MEDLINE    
In order to determine whether the hemodynamic benefit of atrioventricular synchronous pacing is maintained in the upright position, 14 patients with dual chamber pacemakers were paced in VVI mode and DDD mode in both the supine and standing position. The hemodynamic response was assessed by measuring the velocity time integral derived from the pulsed-wave Doppler signal in the left ventricular outflow tract during VVI pacing and dual chamber pacing at three different AV delays (125, 200, 250 ms). In the supine position, the velocity time integral during VVI pacing was 14.6 +/- 3.0 cm and this increased during DDD pacing at all three AV delays (17.7 +/- 3.3, 17.9 +/- 3.0, 17.5 +/- 3.5 cm). In the upright position, the velocity time integral during VVI pacing was 12.9 +/- 3.5 cm and this increased with DDD pacing (15.5 +/- 3.3, 15.1 +/- 4.0, 15.1 +/- 3.9 cm). It was concluded that although stroke volume decreases when assuming the upright position, the beneficial response to dual chamber pacing is maintained and equals that observed in the supine position.
R J Hoeschen; S C Reimold; R T Lee; T J Plappert; G A Lamas
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  14     ISSN:  0147-8389     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  1991 May 
Date Detail:
Created Date:  1991-08-16     Completed Date:  1991-08-16     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  756-9     Citation Subset:  IM    
University of Manitoba, St. Boniface General Hospital, Winnipeg, Canada.
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MeSH Terms
Aged, 80 and over
Aorta / physiopathology
Atrioventricular Node / physiopathology
Blood Flow Velocity
Cardiac Output
Cardiac Pacing, Artificial / methods*
Cardiomegaly / physiopathology
Coronary Disease / physiopathology
Echocardiography, Doppler
Heart Diseases / physiopathology*
Middle Aged
Mitral Valve Insufficiency / physiopathology
Pacemaker, Artificial
Sick Sinus Syndrome / therapy

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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