Document Detail


Myocardial revascularization in patients with ischemic cardiomyopathy: functional observations.
MedLine Citation:
PMID:  9436563     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: A prospective angiographic study was undertaken to investigate, with an objective analysis, the global and regional wall response to myocardial revascularization. METHODS: Thirty-one patients (30 men and 1 woman, mean age, 61 years) with a left ventricular ejection fraction of less than 0.30 were admitted to our institution between 1992 and 1995 for two- or three-vessel coronary artery disease requiring myocardial revascularization. All patients underwent isolated coronary artery bypass grafting and were studied 3 months later with angiography. Preoperative and postoperative wall motion were analyzed using special software that computed a segmental left ventricular ejection fraction, generating a segmental score. Computerized analysis allowed us to distinguish patients with diffuse hypokinesis and a symmetric contraction pattern from patients with akinesis involving at least two segments and an asymmetric contraction pattern. RESULTS: There were no operative deaths and no patient required intraaortic balloon counterpulsation. One patient had postoperative enzymatic evidence of myocardial infarction. Postoperative angiography showed a graft patency rate of 84%. Global analysis showed a small but significant rise in the left ventricular ejection fraction (0.25 +/- 0.51 to 0.31 +/- 0.70, p < 0.001) and a fall in the left ventricular end-diastolic pressure (23.7 +/- 10 to 16.5 +/- 9 mm Hg, p < 0.01). Mean scores always have been lower after the operation than before it, with the best results obtained for the apex and the worst for the anterobasal segment. The group with a symmetric contraction pattern showed a trend toward a better hemodynamic response than the group with an asymmetric contraction pattern. Regression analysis revealed two important predictors of segmental functional improvement: (1) the absence of an echocardiographic scar, and (2) the presence of a collateral circulation. CONCLUSIONS: Coronary artery bypass grafting produced a small but substantial improvement in patients with ischemic cardiomyopathy. The greater benefit occurred in patients with a symmetric contraction pattern. The absence of an echocardiographic scar and the presence of a collateral circulation predicted segmental functional improvement.
Authors:
M Salati; M Lemma; D G Di Mattia; P Danna; A Cialfi; A Salvaggio; C Santoli
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Annals of thoracic surgery     Volume:  64     ISSN:  0003-4975     ISO Abbreviation:  Ann. Thorac. Surg.     Publication Date:  1997 Dec 
Date Detail:
Created Date:  1998-02-10     Completed Date:  1998-02-10     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  15030100R     Medline TA:  Ann Thorac Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1728-34     Citation Subset:  AIM; IM    
Affiliation:
Department of Thoracic and Cardiovascular Surgery, Luigi Sacco Hospital, Milan, Italy.
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MeSH Terms
Descriptor/Qualifier:
Aged
Collateral Circulation
Coronary Angiography
Coronary Artery Bypass*
Coronary Disease / physiopathology*,  surgery*
Echocardiography
Female
Heart Failure / physiopathology
Hemodynamics
Humans
Male
Middle Aged
Stroke Volume
Vascular Patency

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


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