Measurement and validity of the ventilatory threshold in patients with congenital heart disease.

Measurement and validity of the ventilatory threshold in patients with congenital heart disease. Research Abstract Details 

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Measurement and validity of the ventilatory threshold in patients with congenital heart disease. Abstract Text:

H Ohuchi,T Nakajima,M Kawade,M Matsuda,T Kamiya,

The purpose of the present study was to measure oxygen uptake (VO2) at the ventilatory threshold (VT) in patients with congenital heart disease using a progressive exercise protocol on a treadmill and to evaluate the validity and feasibility of this procedure. Eight control subjects and seventeen patients performed a maximal exercise test with breath-by-breath measurement of ventilation and gas exchange variables. VT(VE) was determined by the change in the ventilatory equivalent for VO2 and carbon dioxide output, VT(V-sl) by the V-slope method, and the lactate threshold (LT) by the change in blood lactate concentration; these parameters were determined in 100%, 88%, and 96% of subjects, respectively. The interobserver error among three evaluators was not significant, and LT was correlated with each VT (r = 0.97, 0.92; p = 0.0001) and with peak VO2 (r = 0.91; p = 0.0001). The VTs were correlated with each other when expressed as milliliter per minute and milliliters per kilogram per minute. It was concluded that a progressive exercise protocol on a treadmill was a feasible procedure for determining the VTs in most individuals and that VTs were valid, useful parameters for evaluating submaximal exercise tolerance in patients with congenital heart disease.

Measurement and validity of the ventilatory threshold in patients with congenital heart disease. Publishing Authors By Initials

H Ohuchi,T Nakajima,M Kawade,M Matsuda,T Kamiya,

For similar investigative techniques: epidemiologic methods: epidemiologic research design: reproducibility of results research abstracts see: investigative techniques: epidemiologic methods: epidemiologic research design: reproducibility of results research

PUBMED ID PMID:

MEDLINE DATE: 1996 Jan-Feb

Measurement and validity of the ventilatory threshold in patients with congenital heart disease. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Pediatric cardiology

VOLUME: 17

Page Numbers: 7-14

Journal Abbreviation: Pediatr Cardiol

ISSN: 0172-0643

DAY: 20

MONTH: 02

YEAR: 2008

Measurement and validity of the ventilatory threshold in patients with congenital heart disease. Information

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LANGUAGE: eng

NlmUniqueID: 8003849

Measurement and validity of the ventilatory threshold in patients with congenital heart disease. Keywords Mesh Terms:

KEYWORDS: Reproducibility of Results

MESH TERMS: blood

Chemical & Substance for Abstract: Measurement and validity of the ventilatory threshold in patients with congenital heart disease. Information

Substance Name: Lactates

Registry Number: 0

Grant and Affiliation Information for Measurement and validity of the ventilatory threshold in patients with congenital heart disease.

AFFILIATION: Department of Pediatrics, National Cardiovascular Center, Osaka, Japan.

Country: UNITED STATES

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MEDLINETA: Pediatr Cardiol

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