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Maximal oxygen intake and nomographic assessment of functional aerobic impairment in cardiovascular disease
The American heart journal, 1973-04, Vol.85 (4), p.546-562
[Peer Reviewed Journal]
1973 ;ISSN: 0002-8703 ;EISSN: 1097-6744 ;DOI: 10.1016/0002-8703(73)90502-4 ;PMID: 4632004
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Title:
Maximal oxygen intake and nomographic assessment of functional aerobic impairment in cardiovascular disease
Author:
Bruce, R.A.
;
Kusumi, F.
;
Hosmer, D.
Subjects:
Adult
;
Age Factors
;
Angina Pectoris - physiopathology
;
Coronary Disease - metabolism
;
Coronary Disease - physiopathology
;
Female
;
Heart Diseases - physiopathology
;
Humans
;
Hypertension - metabolism
;
Hypertension - physiopathology
;
Male
;
Middle Aged
;
Myocardial Infarction - physiopathology
;
Nitroglycerin - pharmacology
;
Oxygen Consumption - drug effects
;
Physical Exertion
;
Sex Factors
;
Time Factors
Is Part Of:
The American heart journal, 1973-04, Vol.85 (4), p.546-562
Description:
Maximal oxygen intake (V̇o 2max) was measured, using an open circuit technique, during the last 2 to 4 minutes of a multistage treadmill test of maximal exercise in 151 men and 144 women of 29 to 73 years of age. V̇o 2max was higher in men than in women (P < 0.0001), lower in sedentary than in physically active persons (P < 0.001 in men, < 0.01 in women), and diminished with age in cross-sectional comparisons. It was highly correlated with duration of exercise by this standardized protocol. Accordingly, by regression equations average normal values for healthy persons could be predicted from sex, activity status, and age; values expected on testing could be estimated from the duration of exercise. Over 800 measurements of V̇o 2max were also made during submaximal exercise to define the aerobic requirements under these conditions of testing. This revealed different coefficients for slope and intercept of regression equation for relationship of V̇o 2submax to duration of submaximal exercise. Functional aerobic impairment (FAI) is the per cent difference between observed (or estimated) V̇o 2max and that predicted from age, sex, and activity status by regression equations. Nomograms for rapid derivation of FAI from age in years and duration of maximal exercise were constructed for healthy men, women, and cardiac men to facilitate clinical usage of these methods. Functional aerobic impairment was 23 per cent in a group of symptomatic hypertensive men; it was 24 per cent in men with healed myocardial infarction, free from angina on maximal exertion, but 41 per cent in men with angina of effort, with or without evidence of prior infarction. In men with either angina or only healed myocardial infarction, impairment was reduced during treatment with nitroglycerin.
Publisher:
United States: Mosby, Inc
Language:
English
Identifier:
ISSN: 0002-8703
EISSN: 1097-6744
DOI: 10.1016/0002-8703(73)90502-4
PMID: 4632004
Source:
MEDLINE
Alma/SFX Local Collection
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