PMID: 3383873Mar 1, 1988Paper

Direct Fick cardiac output: are assumed values of oxygen consumption acceptable?

European Heart Journal
A H KendrickA Rozkovec

Abstract

The use of assumed values of oxygen consumption has become an accepted practice in the calculation of direct Fick cardiac output. A survey showed that the assumed values in common use were derived from basal metabolic rate studies on normal subjects, a use which may not be valid. We have compared previous assumed values based on basal metabolic rate or cardiac catheterization studies with those obtained by direct measurement in 80 patients (age range 38-78 years) with various cardiac disorders. Comparison of the assumed and directly measured values of indexed oxygen consumption and the cardiac index showed large discrepancies, with over half the values differing by more than +/- 10% and many by more than +/- 25% from the measured value. Assumed values of oxygen consumption should be used with caution when calculating cardiac output during cardiac catheterization procedures, because large errors can result. The equations of LaFarge and Miettinen gave the closest approximation to the measured data and their use is recommended in preference to values predicted from basal metabolic rate studies.

Citations

Jun 1, 2012·Circulation. Cardiovascular Interventions·Zachary M GertzHoward C Herrmann
Oct 1, 2013·Circulation·Nikhil NarangDarren K McGuire
Jan 8, 2019·Clinical Cardiology·Wilson C KwanDavid R Laughrun
Nov 10, 2010·Seminars in Cardiothoracic and Vascular Anesthesia·Jacob Pugsley, Adam B Lerner
Jun 26, 2010·Catheterization and Cardiovascular Interventions : Official Journal of the Society for Cardiac Angiography & Interventions·Mario Gössl, Charanjit S Rihal
Apr 29, 1998·Catheterization and Cardiovascular Diagnosis·A WolfE L Alderman
Nov 22, 2011·The American Journal of Cardiology·Nikhil NarangDarren K McGuire
Jun 29, 2021·Current Treatment Options in Cardiovascular Medicine·J Emanuel FinetW H Wilson Tang

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