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Effects of sampling interval on peak oxygen consumption in patients evaluated for heart transplantation.

Authors
  • Johnson, J S
  • Carlson, J J
  • VanderLaan, R L
  • Langholz, D E
Type
Published Article
Journal
Chest
Publication Date
Mar 01, 1998
Volume
113
Issue
3
Pages
816–819
Identifiers
PMID: 9515862
Source
Medline
License
Unknown

Abstract

Measures of peak oxygen consumption differed significantly (p<0.001) between sampling averages. A maximum variability of 20% was noted between the largest and smallest averages (13.8+/-4.2 mL/kg/min for 60 s vs 17.3+/-4.2 mL/kg/min for breath by breath). No significant difference was found between the 30-s, 15-s, and eight breath rolling averages (14.2+/-3.7 vs 14.5+/-3.9 vs 14.7+/-4.3 mL/kg/min), respectively. Results of the study suggest (1) the sampling average can have a significant effect on peak oxygen consumption influencing patient selection for transplantation, and (2) sample averages larger than breath by breath but smaller than 60 s be used for determination of peak oxygen consumption.

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