Determination of aerobic capacity and the severity of chronic cardiac and circulatory failure

Karl Weber, J. S. Janicki, P. A. McElroy

Research output: Contribution to journalReview article

99 Citations (Scopus)

Abstract

The noninvasive determination of maximal oxygen uptake or V̇O2max, defined as a plateau in V̇O2 during incremental treadmill exercise, is an objective, reproducible, and negotiable measure of the severity of chronic cardiac or circulatory failure. Moreover, this noninvasive variable predicts the exercise cardiac output response and thereby the cardiac reserve. The lactate or anaerobic threshold has been validated in these patients from the response of mixed venous lactate to incremental exercise and has been shown to be another objective measure of the severity of chronic cardiac or circulatory failure. The anaerobic threshold can be reliably assessed from the response in breath-by-breath respiratory gas exchange by the use of multiple criteria, several of which can be monitored during the exercise test itself and the remainder of which can be measured during the recovery period. We find the breath-by-breath monitoring of respiratory gas exchange and air flow to provide the best means of assessing the anaerobic threshold and for identifiying the plateau in V̇O2, or V̇O2max, in response to incremental treadmill exercise.

Original languageEnglish (US)
JournalCirculation
Volume76
Issue number6 II SUPPl.
StatePublished - Dec 1 1987
Externally publishedYes

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Anaerobic Threshold
Shock
Heart Failure
Exercise
Lactic Acid
Gases
Exercise Test
Cardiac Output
Air
Oxygen

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

Cite this

Determination of aerobic capacity and the severity of chronic cardiac and circulatory failure. / Weber, Karl; Janicki, J. S.; McElroy, P. A.

In: Circulation, Vol. 76, No. 6 II SUPPl., 01.12.1987.

Research output: Contribution to journalReview article

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