Document Detail


Radionuclide monitoring of cardiac adaptations to volume loading in patients with dilated cardiomyopathy and mild heart failure. Effects of angiotensin-converting enzyme inhibition.
MedLine Citation:
PMID:  7586352     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Cardiac adaptations to volume overload have been poorly investigated in heart failure. The aim of this study was to assess dynamic left ventricular responses to acute volume loading by continuous radionuclide monitoring in patients with asymptomatic to mildly symptomatic left ventricular dysfunction. METHODS AND RESULTS: Left ventricular end-diastolic (EDV) and end-systolic (ESV) volumes, ejection fraction (EF), and peak filling rate (PFR) were monitored by a radionuclide detector (Vest) before and during volume expansion (sodium chloride, 0.9%, 0.25 mL.kg-1.min-1 for 2 hours) in 10 patients with idiopathic dilated cardiomyopathy (DCM) and mild heart failure (New York Heart Association class I or II, ejection fraction < 50%). The patients were studied off treatment and after 6 to 8 weeks of oral treatment with enalapril (5 mg/d). A control group of 11 age- and sex-matched healthy volunteers (N group) was also studied. In the N group, volume loading caused prompt and sustained increases of EDV, EF, and PFR (all P < .001), whereas ESV was progressively reduced (P < .001), and heart rate and blood pressure did not change. In contrast, in DCM, EDV showed a smaller increase than in the N group (two-way ANOVA: F = 5.98, P < .001), ESV increased (P < .001), and EF and PFR remained unchanged. After enalapril, the cardiac adaptations to volume loading were restored to normal. In particular, EDV, EF, and PFR increased (P < .001), and ESV was reduced (P < .001). In 6 additional DCM patients studied before and after 6 to 8 weeks of placebo treatment, left ventricular responses to volume loading remained unchanged. CONCLUSIONS: Left ventricular dynamic adaptations to acute volume loading are compromised in patients with idiopathic DCM and mild heart failure. These impaired responses are ameliorated by treatment with enalapril.
Authors:
M Volpe; M A Rao; A Cuocolo; R Russo; A Nappi; A F Mele; I Enea; B Trimarco; M Condorelli
Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Circulation     Volume:  92     ISSN:  0009-7322     ISO Abbreviation:  Circulation     Publication Date:  1995 Nov 
Date Detail:
Created Date:  1995-12-20     Completed Date:  1995-12-20     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2511-8     Citation Subset:  AIM; IM    
Affiliation:
Prima Clinica Medica, Federico II University, Naples, Italy.
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MeSH Terms
Descriptor/Qualifier:
Adult
Angiotensin-Converting Enzyme Inhibitors / therapeutic use*
Cardiac Volume / drug effects
Cardiomyopathy, Dilated / drug therapy,  physiopathology*,  radionuclide imaging
Enalapril / therapeutic use*
Female
Heart Failure / drug therapy,  physiopathology*,  radionuclide imaging
Humans
Male
Middle Aged
Radionuclide Ventriculography
Ventricular Function, Left
Chemical
Reg. No./Substance:
0/Angiotensin-Converting Enzyme Inhibitors; 75847-73-3/Enalapril

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


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