Document Detail

Myocardial asynchrony in patients with postinfarction intraventricular conduction defects.
MedLine Citation:
PMID:  18001355     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Postinfarction intraventricular conduction defects lead to asynchronous activation of the myocardium.
HYPOTHESIS: The aim of the current study is to evaluate contraction asynchrony in postinfarction patients with intraventricular conduction defects.
METHODS: A total of 158 patients 6 months postmyocardial infarction and 15 healthy subjects underwent echocardiography to evaluate atrioventricular, interventricular, intraventricular asynchrony, and myocardial performance index (MPI). A subgroup of 126 patients had intraventricular conduction defects in ECG, whereas 32 with normal QRS complex served as controls.
RESULTS: All patients postmyocardial infarction showed intraventricular asynchrony and markedly higher MPI. Comparing groups with and without intraventricular conduction defects postmyocardial infarction, those with left bundle branch block (BBB) had significantly higher parameters of all asynchrony types; those with right BBB and left posterior hemiblock (LPH) had significantly higher interventricular asynchrony parameters; those with left anterior hemiblock did not show significant differences in asynchrony parameters as compared with subjects without postinfarction conduction defects.
CONCLUSIONS: (1) Patients 6 months postmyocardial infarction show intraventricular asynchrony and markedly higher MPI. (2) Postinfarction patients with LBBB have the highest parameters of atrioventricular, interventricular and intraventricular asynchrony as compared with postinfarction patients with other and without conduction defects. (3) In postinfarction patients with RBBB or LPH parameters of interventricular asynchrony are significantly higher as compared with postinfarction patients without intraventricular conduction defects.
Marianna Janion; Katarzyna Ciuraszkiewicz; Janusz Sielski; Urszula Grabowska; Zenon Gawor
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Echocardiography (Mount Kisco, N.Y.)     Volume:  24     ISSN:  0742-2822     ISO Abbreviation:  Echocardiography     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2007-11-16     Completed Date:  2008-01-29     Revised Date:  2014-07-30    
Medline Journal Info:
Nlm Unique ID:  8511187     Medline TA:  Echocardiography     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1029-34     Citation Subset:  IM    
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MeSH Terms
Echocardiography, Doppler, Color / methods
Follow-Up Studies
Heart Conduction System / physiopathology*
Heart Rate / physiology
Heart Ventricles / innervation*,  physiopathology,  ultrasonography
Middle Aged
Myocardial Contraction / physiology
Myocardial Infarction / complications*,  physiopathology,  ultrasonography
Retrospective Studies
Severity of Illness Index
Tachycardia, Ventricular / etiology*,  physiopathology,  ultrasonography

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

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