Document Detail


Left ventricular systolic and diastolic function in aortic stenosis. Prognostic value after valve replacement and underlying mechanisms.
MedLine Citation:
PMID:  9447328     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIMS: The aims of the study were to examine the prognostic value of pre-operative left ventricular systolic and diastolic function on early, and late mortality after valve replacement for aortic stenosis, and to identify possible underlying mechanisms. METHODS AND RESULTS: Ninety-one prospectively recruited consecutive patients with a mean age of 61 years underwent valve replacement for aortic stenosis with concomitant coronary artery bypass grafting in 32 and a minimum postoperative observation period of 5.4 years. There were six early (< or = 30 days postoperatively) and 19 late deaths, and 18 deaths from specific causes (cardiac and prosthetic valve related). Early mortality occurred exclusively among patients with a combined subnormal left ventricular systolic function (subnormal ejection fraction or peak ejection rate, or supranormal time-to-peak ejection--duration of systole ratio) and a subnormal fast filling fraction. In Cox regression models on crude mortality and specific deaths, a subnormal ejection fraction and a fast filling fraction of < or = 45% were the only independent risk factors. Patients with none of these risk factors had normal sex- and age-specific survival, those with any one factor had an early, and those with both factors a massive early and a late excess mortality, with 5-year crude survival of 92%, 77%, and 50%, respectively (P < 0.0001). Systolic wall stress was without prognostic value. Further analyses indicated that impairment of left ventricular function occurred with increasing muscle mass over two phases: (1) diastolic dysfunction characterized by a pattern of severe relative concentric hypertrophy; (2) the addition of systolic dysfunction characterized by a more dilated, less concentric chamber geometry. Coronary artery disease seemed to provoke the latter development sooner. CONCLUSIONS: Impaired systolic and diastolic left ventricular function, irrespective of afterload, were decisive independent pre-operative risk factors for early as well as late mortality after aortic valve replacement for aortic stenosis. The adverse influence of concentric hypertrophy was the main underlying mechanism. Operative intervention, before impairment of diastolic and systolic function, should be advocated.
Authors:
O Lund; C Flø; F T Jensen; K Emmertsen; T T Nielsen; B S Rasmussen; O K Hansen; H K Pilegaard; L H Kristensen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  European heart journal     Volume:  18     ISSN:  0195-668X     ISO Abbreviation:  Eur. Heart J.     Publication Date:  1997 Dec 
Date Detail:
Created Date:  1998-03-18     Completed Date:  1998-03-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8006263     Medline TA:  Eur Heart J     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1977-87     Citation Subset:  IM    
Affiliation:
Department of Thoracic and Cardiovascular Surgery, Skejby Sygehus, Aarhus University Hospital, Denmark.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Aged, 80 and over
Aortic Valve Stenosis / mortality,  physiopathology*,  surgery
Female
Heart Valve Prosthesis Implantation
Humans
Logistic Models
Male
Middle Aged
Models, Cardiovascular
Models, Statistical
Prognosis
Prospective Studies
Risk Factors
Survival Analysis
Ventricular Function, Left*
Comments/Corrections
Comment In:
Eur Heart J. 1997 Dec;18(12):1845-7   [PMID:  9447307 ]

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


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