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- W1849209997 abstract "BACKGROUND: Airflow limitation may be an occult cause of exercise intolerance in congenital heart disease (CHD). We examined exercise tidal flow-volume loop analysis to determine the presence or absence of ventilatory limitation to exercise.METHODS: Subjects performed a maximal cycle ergometer test to voluntary exhaustion. Gas exchange was measured breath-by-breath using a MedGraphics CPX/D (Breeze software, Medical Graphics Corp) which also computed percent flow limitation (%FL, percentage of exercise V t where flow equaled or exceeded the maximum expiratory flow-volume envelope). 4/5 patients had chest CT to examine tracheal calibre. Routine spirometry included MVV by 12-sec sprint method.RESULTS: Sample exercise tidal flow-volume loops is shown in FigureView this table:Patients, diagnoses, and maximal exercise data.![Figure][1] CONCLUSION: Convential mesurement of maximal exercise V e /MVV failed to identify exercise airflow limitation. Flow limitation occurs CHD patients with enlarged/malpositioned great vessels and is best determined by analysis of exercise flow-volume loop. [1]: pending:yes" @default.
- W1849209997 created "2016-06-24" @default.
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- W1849209997 date "2014-09-01" @default.
- W1849209997 modified "2023-09-24" @default.
- W1849209997 title "Exercise flow-volume loops in children & adolescents with congenital heart disease" @default.
- W1849209997 hasPublicationYear "2014" @default.
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