Document Detail

Usefulness of Doppler echocardiography in cardiac pacing: assessment of mitral regurgitation, peak aortic flow velocity and atrial capture.
MedLine Citation:
PMID:  6196746     Owner:  NLM     Status:  MEDLINE    
Doppler echocardiographic studies were performed in 14 patients with dual chamber pacemakers. Transmitral flow studies (12 patients) revealed absence of mitral regurgitation (MR) or no change in MR severity in 6, new development or increased MR during VVI and/or short or long AV interval lengths compared to more normal AV intervals (150-160 ms) in 5, and appearance of MR when the pacing mode was changed from VVI to DVI with a fixed AV interval of 250 ms in 1 patient. Aortic peak flow velocity measurements (7 patients) showed significant increases in stroke volume (range 9 to 25%, mean 19.5%) in all patients with DVI/VDD pacing compared to VVI pacing (4 patients) or to shortest available AV interval (3 patients). Presence of Doppler left atrial systolic flow correlated with evidence of atrial depolarization in all 7 patients in whom high quality 12-lead surface electrocardiograms were obtained. Our preliminary study demonstrates the value of Doppler echocardiography in the "fine tuning" of cardiac pacemaker parameters by assessment of presence, absence, or change in severity of MR, estimation of relative changes in stroke volume, and determination of atrial capture in different pacing modes and at various AV intervals.
F T Zugibe; N C Nanda; S S Barold; T Akiyama
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  6     ISSN:  0147-8389     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  1983 Nov 
Date Detail:
Created Date:  1984-01-27     Completed Date:  1984-01-27     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1350-7     Citation Subset:  IM    
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MeSH Terms
Arrhythmias, Cardiac / physiopathology,  therapy
Cardiac Output*
Cardiac Pacing, Artificial / methods*
Coronary Circulation*
Mitral Valve Insufficiency / diagnosis,  physiopathology*
Stroke Volume*

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