Document Detail


Impact of mitral regurgitation on exercise capacity and clinical outcomes in patients with ischemic left ventricular dysfunction.
MedLine Citation:
PMID:  21943932     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
There is uncertainty and debate regarding whether ischemic mitral regurgitation (MR) is a secondary epiphenomenon resulting from left ventricular (LV) dysfunction or confers an independent effect on exercise capacity and outcomes. We tested whether ischemic MR negatively affects exercise capacity and cardiovascular morbidity and mortality in patients with coronary artery disease (CAD) and those with inferior wall motion abnormality independent of LV dysfunction. Clinical follow-up over 5 years was obtained in 77 patients (64 ± 10 years old, LV ejection fraction 54 ± 11%) with at least mild ischemic MR from CAD and evidence of inferior wall motion abnormality who had exercise stress testing with perfusion imaging within 24 hours of echocardiography. Patients with active heart failure, ischemia, intrinsic valve disease, pulmonary and vascular diseases were excluded. Exercise capacity (METs, peak double product) was tested for relation to MR (vena contracta [VC] and jet area), LV size and function, and pulmonary pressures. Cox proportional hazards analysis assessed whether MR predicted cardiovascular events including hospitalization for heart failure, acute coronary syndrome, and myocardial infarction and cardiovascular and total mortalities. Univariate correlation identified MR with VC (r = -0.674, p <0.0001) and MR jet area (r = -0.575, p <0.0001) as determinants of decreased functional capacity evaluated by METs, with VC the stronger predictor. MR VC >2 mm (moderate ischemic MR) and age were independent predictors of cardiovascular events and death (hazard ratio 6.72 for MR, p = 0.04). In conclusion, in patients with CAD and LV inferior wall motion abnormality, MR negatively affects exercise capacity and is associated with increased cardiovascular morbidity and mortality. This effect appears independent of degree of LV dysfunction.
Authors:
Catherine Szymanski; Robert A Levine; Christophe Tribouilloy; Hui Zheng; Mark D Handschumacher; Ahmed Tawakol; Judy Hung
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-09-21
Journal Detail:
Title:  The American journal of cardiology     Volume:  108     ISSN:  1879-1913     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-02     Completed Date:  2012-01-23     Revised Date:  2014-09-18    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1714-20     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2011 Elsevier Inc. All rights reserved.
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MeSH Terms
Descriptor/Qualifier:
Exercise Test
Exercise Tolerance
Female
Humans
Male
Middle Aged
Mitral Valve Insufficiency / complications*,  physiopathology*
Myocardial Ischemia / complications*,  physiopathology*
Retrospective Studies
Ventricular Dysfunction, Left / complications*,  physiopathology*
Grant Support
ID/Acronym/Agency:
R01 HL072265/HL/NHLBI NIH HHS; R01 HL072265-06/HL/NHLBI NIH HHS; R01 HL092101/HL/NHLBI NIH HHS
Comments/Corrections

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


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