| Reduced left ventricular systolic pump performance and depressed myocardial contractile function in patients > 65 years of age with normal ejection fraction and a high relative wall thickness. | |
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MedLine Citation:
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PMID: 7572629 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We studied the relation between relative wall thickness, left ventricular systolic pump performance, and myocardial contractile function in 77 older patients with normal ejection fraction who were free of valvular and myocardial ischemic disease. Group 1 comprised 49 patients with relative wall thickness > or = 0.45; group 2 (n = 28) had normal relative wall thickness. Pump performance was characterized by stroke volume index, cardiac index, and stroke work; myocardial function was characterized by midwall shortening and circumferential stress versus shortening relations. Group 1 patients had lower end-diastolic volume (83 +/- 3 vs 124 +/- 5 ml, p < 0.05), cardiac index (2.6 +/- 0.2 vs 3.5 +/- 0.1 L/min/m2, p < 0.05), and stroke work/100 g left ventricular mass (43 +/- 2 vs 53 +/- 3 g-m/100 g, p < 0.005). Although there was no significant difference with regard to ejection fraction or fractional shortening at the endocardium, fractional shortening at the midwall was significantly lower in group 1 than in group 2 (16 +/- 1% vs 19 +/- 1%, p < 0.005). This lower value for midwall shortening was observed despite lower values for endsystolic stress, implying decreased myocardial contractile function. Lower stroke volume index in group 1 patients, likely due to small chamber size, was not offset by increased heart rate, resulting in a low-normal cardiac index; in 33% of group 1 patients, cardiac index was < 2.2 L/min/m2, indicating reduced pump performance. Our data indicate an abnormality in pump performance and myocardial function in patients who have high relative wall thickness and normal ejection fraction. |
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Authors:
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G P Aurigemma; W H Gaasch; M McLaughlin; R McGinn; A Sweeney; T E Meyer |
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Publication Detail:
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Type: Clinical Trial; Journal Article |
Journal Detail:
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Title: The American journal of cardiology Volume: 76 ISSN: 0002-9149 ISO Abbreviation: Am. J. Cardiol. Publication Date: 1995 Oct |
Date Detail:
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Created Date: 1995-10-27 Completed Date: 1995-10-27 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0207277 Medline TA: Am J Cardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 702-5 Citation Subset: AIM; IM |
Affiliation:
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Division of Cardiology, University of Massachusetts Medical Center, Worcester 01655, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Age Factors Aged Chi-Square Distribution Echocardiography Echocardiography, Doppler Female Heart Ventricles / ultrasonography Humans Hypertrophy, Left Ventricular / physiopathology*, ultrasonography Male Myocardial Contraction* Retrospective Studies Stroke Volume* Systole Ventricular Function, Left* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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