Document Detail


The pathophysiology of heart failure with normal ejection fraction: exercise echocardiography reveals complex abnormalities of both systolic and diastolic ventricular function involving torsion, untwist, and longitudinal motion.
MedLine Citation:
PMID:  19555838     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVES: The purpose of this study was to test the hypothesis that in heart failure with normal ejection fraction (HFNEF) exercise limitation is due to combined systolic and diastolic abnormalities, particularly involving ventricular twist and deformation (strain) leading to reduced ventricular suction, delayed untwisting, and impaired early diastolic filling. BACKGROUND: A substantial proportion of patients with heart failure have a normal left ventricular ejection fraction. Currently the pathophysiology is considered to be due to abnormal myocardial stiffness and relaxation. METHODS: Patients with a diagnosis of HFNEF and proven cardiac limitation by cardiopulmonary exercise testing were studied by standard, tissue Doppler, and speckle tracking echocardiography at rest and on submaximal exercise. RESULTS: Fifty-six patients (39 women; mean age 72 +/- 7 years) with a clinical diagnosis of HFNEF and 27 age-matched healthy control subjects (19 women; mean age 70 +/- 7 years) had rest and exercise images of sufficient quality for analysis. At rest, systolic longitudinal and radial strain, systolic mitral annular velocities, and apical rotation were lower in patients, and all failed to rise normally on exercise. Systolic longitudinal functional reserve was also significantly lower in patients (p < 0.001). In diastole, patients had reduced and delayed untwisting, reduced left ventricular suction at rest and on exercise, and higher end-diastolic pressures. Mitral annular systolic and diastolic velocities, systolic left ventricular rotation, and early diastolic untwist on exercise correlated with peak VO(2)max. CONCLUSIONS: In HFNEF there are widespread abnormalities of both systolic and diastolic function that become more apparent on exercise. HFNEF is not an isolated disorder of diastole.
Authors:
Yu Ting Tan; Frauke Wenzelburger; Eveline Lee; Grant Heatlie; Francisco Leyva; Kiran Patel; Michael Frenneaux; John E Sanderson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  54     ISSN:  1558-3597     ISO Abbreviation:  J. Am. Coll. Cardiol.     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-06-26     Completed Date:  2009-07-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  36-46     Citation Subset:  AIM; IM    
Affiliation:
Department of Cardiovascular Medicine, University of Birmingham, Birmingham, UK.
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MeSH Terms
Descriptor/Qualifier:
Aged
Case-Control Studies
Diastole
Echocardiography, Doppler, Color / statistics & numerical data*
Exercise / physiology*
Exercise Test
Female
Heart Failure, Diastolic / physiopathology*,  ultrasonography
Hemodynamics
Humans
Male
Observer Variation
Oxygen Consumption
Rotation
Systole
Torsion Abnormality*
Ventricular Function*
Grant Support
ID/Acronym/Agency:
//British Heart Foundation
Comments/Corrections
Comment In:
J Am Coll Cardiol. 2009 Jun 30;54(1):47-8   [PMID:  19555839 ]

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