Document Detail


Hemodynamic basis of exercise limitation in patients with heart failure and normal ejection fraction.
MedLine Citation:
PMID:  20813283     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: The purpose of this study was to invasively investigate the hemodynamic response to exercise in patients with heart failure with normal ejection fraction (HFNEF) and to evaluate the ability of the peak early diastolic transmitral velocity to peak early diastolic annular velocity ratio (E/e') to reflect exercise hemodynamics. BACKGROUND: There is little information regarding the hemodynamic response to exercise in HFNEF. METHODS: Patients with HFNEF (n = 14) and asymptomatic controls (n = 8) underwent right-side heart catheterization at rest and during supine cycle ergometer exercise and echocardiography with measurement of resting and peak exercise E/e'. RESULTS: Resting pulmonary capillary wedge pressure (PCWP) (10 +/- 4 mm Hg vs. 10 +/- 4 mm Hg; p = 0.94) was similar in HFNEF patients and controls, but stroke volume index (SVI) (p = 0.02) was lower, and systemic vascular resistance index (SVRI) (p = 0.01) was higher in patients. Patients stopped exercise at lower work rate (0.63 +/- 0.29 W/kg vs. 1.13 +/- 0.49 W/kg; p = 0.006). Although peak exercise PCWP was similar in both groups (23 +/- 6 mm Hg vs. 20 +/- 7 mm Hg; p = 0.31), the peak PCWP/work rate ratio was higher in patients compared with controls (46 +/- 31 mm Hg/W/kg vs. 20 +/- 9 mm Hg/W/kg; p = 0.03). Peak exercise SVI (p = 0.001) was lower and SVRI was higher (p = 0.01) in patients. Resting E/e' was modestly elevated in patients (13.2 +/- 4.1 vs. 9.5 +/- 3.4; p = 0.04). Peak exercise E/e' did not differ between the groups (11.1 +/- 3.4 vs. 9.4 +/- 3.4; p = 0.28). CONCLUSIONS: The HFNEF patients achieved a similar peak exercise PCWP to that of asymptomatic controls, at a much lower workload. This occurs at a lower SVI and in the setting of higher SVRI. The E/e' does not reflect the hemodynamic changes during exercise in HFNEF patients.
Authors:
Micha T Maeder; Bruce R Thompson; Hans-Peter Brunner-La Rocca; David M Kaye
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  56     ISSN:  1558-3597     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-03     Completed Date:  2010-10-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  855-63     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2010 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.
Affiliation:
Heart Failure Research Group, Baker IDI Heart and Diabetes Institute, Melbourne, Australia.
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MeSH Terms
Descriptor/Qualifier:
Aged
Case-Control Studies
Exercise / physiology*
Female
Heart Failure / physiopathology*
Hemodynamics*
Humans
Male
Middle Aged
Stroke Volume*
Comments/Corrections
Comment In:
J Am Coll Cardiol. 2010 Sep 7;56(11):864-6   [PMID:  20813284 ]

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


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