Document Detail


Preservation of exercise capacity and lack of peripheral changes in asymptomatic patients with severely impaired left ventricular function.
MedLine Citation:
PMID:  11207081     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIMS: To establish the extent, if any, of peripheral changes in asymptomatic patients with severe left ventricular dysfunction. METHODS ANS RESULTS: Nine asymptomatic and nine symptomatic patients with left ventricular ejection fraction, <25%, matched for age and left ventricular ejection fraction (asymptomatic vs symptomatic, age: 52+/-1.5 vs 55.9+/-2.5 years [Mean+/-SEM], left ventricular ejection fraction: 16+/-2 vs 19+/-2%P=0.23 and 0.48, respectively) were studied and compared with 26 age-matched normal controls. We assessed exercise capacity, leg blood flow (occlusion plethysmography), respiratory muscle strength, quadriceps maximal isometric strength, fatigue and CT cross-sectional muscle area at mid thigh. Fatigue was expressed as the percentage reduction in maximal strength following a 20 min fatiguing protocol. There was a graded increase in peak oxygen consumption comparing symptomatic, asymptomatic and control groups (16.6+/-1.3 vs 27.1+/-1.6 vs 32.8+/-1.3 ml x min(-1) x kg(-1)respectively, ANOVA P<0.0001). Between the three groups there was significant variation in muscle strength (P<0.0001), endurance (P=0.0002) and cross-sectional area (P=0.0003) and in peak blood flow (P=0.027) and respiratory muscle strength (P<0.05). When asymptomatic patients and controls were compared no significant differences existed.
CONCLUSIONS: Patients with severe left ventricular dysfunction may have near normal exercise capacity and no peripheral changes. Exercise capacity may depend less upon left ventricular function than on the presence or absence of peripheral factors.
Authors:
D Harrington; S D Anker; A J Coats
Publication Detail:
Type:  Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  European heart journal     Volume:  22     ISSN:  0195-668X     ISO Abbreviation:  Eur. Heart J.     Publication Date:  2001 Mar 
Date Detail:
Created Date:  2001-03-21     Completed Date:  2001-05-10     Revised Date:  2013-05-20    
Medline Journal Info:
Nlm Unique ID:  8006263     Medline TA:  Eur Heart J     Country:  England    
Other Details:
Languages:  eng     Pagination:  392-9     Citation Subset:  IM    
Copyright Information:
Copyright 2001 The European Society of Cardiology.
Affiliation:
Cardiology Department, Kent and Sussex Hospital, Tunbridge Wells, Kent, UK.
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MeSH Terms
Descriptor/Qualifier:
Exercise Test
Exercise Tolerance / physiology*
Heart Failure / physiopathology*
Humans
Middle Aged
Muscular Atrophy / physiopathology*
Prospective Studies
Ventricular Dysfunction, Left / physiopathology*
Comments/Corrections
Comment In:
Eur Heart J. 2001 Mar;22(5):355-6   [PMID:  11207075 ]

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