Document Detail


Noninvasive Assessment of Regional and Global Myocardial Contractility in Normal Control Subjects and in Patients with Dilated Cardiomyopathies.
MedLine Citation:
PMID:  11175061     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The aim of the present study was to develop a new noninvasive approach for the assessment of regional and global myocardial contractility without the need for pharmacological intervention to alter load. Thirty-four healthy adults and five adults with dilated cardiomyopathy (DCM) were studied. Patients with diabetes mellitus and hyperthyroidism were eliminated from the study. The remainder underwent echocardiography, sphygmomanometric blood pressure determination, and carotid pulse tracings. Left ventricular cross section in the parasternal long-axis four- and two-chamber views was divided into 20 segments. Associated measurements of end-systolic pressure and left ventricular ejection time enabled shortening, shortening rate, and ejection fraction/afterload relationships to be determined. A discriminant analysis showed that the ejection fraction/afterload relationship in patients with DCM differed substantially from that of control subjects and was the most sensitive in this regard. Endocardial shortening, mid-wall shortening, and ejection fraction/afterload relationships demonstrated linearity or nonlinearity for control subjects. This study thus permits the assessment of contractility in individual subjects without the need for drug interventions because load alteration stems from the variation of wall stress from base to apex in the left ventricle. More importantly, the approach may be applied to patients with segmental abnormalities of contractile function.
Authors:
Michael J. Domanski; Dean Follman; Marsha Kravitz; Israel Mirsky
Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  Echocardiography (Mount Kisco, N.Y.)     Volume:  15     ISSN:  1540-8175     ISO Abbreviation:  Echocardiography     Publication Date:  1998 Jul 
Date Detail:
Created Date:  2001-Feb-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8511187     Medline TA:  Echocardiography     Country:  -    
Other Details:
Languages:  ENG     Pagination:  429-442     Citation Subset:  -    
Affiliation:
Clinical Trials Group, National Heart, Lung and Blood Institute, Bethesda, MD 20892-7936.
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