Please use this identifier to cite or link to this item: https://scidar.kg.ac.rs/handle/123456789/8471
Title: Reproducibility of Inert Gas Rebreathing Method to Estimate Cardiac Output at Rest and during Cardiopulmonary Exercise Stress Testing
Authors: Okwose N.
Zhang J.
Chowdhury S.
Houghton D.
Ninkovic, Srdjan
Jakovljevic B.
Jevtic B.
Ropret R.
Eggett C.
Bates M.
Macgowan G.
Jakovljević, Dragana
Journal: International Journal of Sports Medicine
Issue Date: 1-Jan-2019
Abstract: © Georg Thieme Verlag KG Stuttgart. New York. The present study evaluated reproducibility of the inert gas rebreathing method to estimate cardiac output at rest and during cardiopulmonary exercise testing. Thirteen healthy subjects (10 males, 3 females, ages 23-32 years) performed maximal graded cardiopulmonary exercise stress test using a cycle ergometer on 2 occasions (Test 1 and Test 2). Participants cycled at 30-watts/3-min increments until peak exercise. Hemodynamic variables were assessed at rest and during different exercise intensities (i. e., 60, 120, 150, 180 watts) using an inert gas rebreathing technique. Cardiac output and stroke volume were not significantly different between the 2 tests at rest 7.4 (1.6) vs. 7.1 (1.2) liters min -1, p=0.54; 114 (28) vs. 108 (15) ml beat -1, p=0.63) and all stages of exercise. There was a significant positive relationship between Test 1 and Test 2 cardiac outputs when data obtained at rest and during exercise were combined (r=0.95, p<0.01 with coefficient of variation of 6.0%), at rest (r=0.90, p<0.01 with coefficient of variation of 5.1%), and during exercise (r=0.89, p<0.01 with coefficient of variation 3.3%). The mean difference and upper and lower limits of agreement between repeated measures of cardiac output at rest and peak exercise were 0.4 (-1.1 to 1.8) liter min -1 and 0.5 (-2.3 to 3.3) liter min -1, respectively. The inert gas rebreathing method demonstrates an acceptable level of test-retest reproducibility for estimating cardiac output at rest and during cardiopulmonary exercise testing at higher metabolic demands.
URI: https://scidar.kg.ac.rs/handle/123456789/8471
Type: Article
DOI: 10.1055/a-0809-5408
ISSN: 01724622
SCOPUS: 85060572635
Appears in Collections:Faculty of Medical Sciences, Kragujevac
[ Google Scholar ]

Page views(s)

52

Downloads(s)

5

Files in This Item:
File Description SizeFormat 
10.1055-a-0809-5408.pdf412.62 kBAdobe PDFThumbnail
View/Open


Items in SCIDAR are protected by copyright, with all rights reserved, unless otherwise indicated.