Document Detail

Echocardiography for determining the optimal atrioventricular interval in patients with dual chamber pacemakers.
MedLine Citation:
PMID:  19685516     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: We investigated the clinical value of Doppler echocardiography for determining the optimal setting of atrioventricular interval in patients with dual chamber pacemakers (DDD). In 38 patients with complete atrioventricular block and DDD pacemakers, the atrioventricular interval was prolonged in a stepwise fashion by 20 ms, from 90 to 250 ms, and cardiac stroke volume and transmitral flow were measured by pulsed Doppler echocardiography. METHODS: The optimal atrioventricular interval at which the cardiac stroke volume was maximal was 168.9 +/- 15.6 ms. The atrioventricular interval was 178.4 +/- 23.4 ms when the end of the A wave coincided with complete closure of the mitral valve. RESULTS: There was a significant linear relationship between the optimal atrioventricular interval and the predicted optimal atrioventricular interval (Y = 86.2 +/- 0.5X, r = 0.70, standard error of the estimate [SEE] = 11.5, P < 0.01). CONCLUSION: The optimal atrioventricular interval setting for DDD pacing can be successfully determined using Doppler echocardiography, which is a noninvasive, repeatable, and simple approach.
Pin Sun; Qing Zhao; Zhi-Bin Wang; Jian-Sheng Li; Jin-Shan Wo; Shang-Lang Cai
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical cardiology     Volume:  32     ISSN:  1932-8737     ISO Abbreviation:  -     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-08-24     Completed Date:  2009-10-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7903272     Medline TA:  Clin Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  439-41     Citation Subset:  IM    
Department of Cardiac Ultrasound, Affiliated Hospital of Medical College, Qingdao University, Qingdao City, China.
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MeSH Terms
Aged, 80 and over
Aortic Valve / physiopathology,  ultrasonography
Atrial Function*
Atrioventricular Block / physiopathology,  therapy*,  ultrasonography*
Cardiac Pacing, Artificial* / adverse effects
Echocardiography, Doppler, Pulsed*
Equipment Design
Linear Models
Middle Aged
Mitral Valve / physiopathology,  ultrasonography
Mitral Valve Insufficiency / etiology,  physiopathology,  prevention & control,  ultrasonography
Myocardial Contraction
Pacemaker, Artificial*
Predictive Value of Tests
Stroke Volume
Time Factors
Treatment Outcome
Ventricular Function*

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