Fick Cardiac Output

Name: Fick Cardiac Output
Creator: Daniel Diaz-Gil, MD
Keywords: Fick, cardiac output, cardiac index, VO2, oxygen consumption, cardiac catheterization, hemodynamics, CO, CI, LaFarge, Miettinen

Calculates cardiac output and cardiac index using the Fick principle with optional LaFarge-Miettinen VO2 estimation

Clinically Verified· 5 tests

For educational and informational purposes only. Verify all results before clinical application.

Use Estimated VO2

If checked, VO2 will be estimated; uncheck to enter measured VO2

Age *

years

Sex *

Heart Rate *

bpm

Hemoglobin *

g/dL

Arterial O2 Saturation (SaO2) *

Venous O2 Saturation (SvO2) *

Body Surface Area (BSA) *

m²

Body surface area in m² — calculate using BSA calculator if needed Body Surface Area (BSA)

References

LaFarge CG, Miettinen OS. The estimation of oxygen consumption. Cardiovasc Res. 1970;4(1):23-30.[DOI]
Fick A. Ueber die Messung des Blutquantums in den Herzventrikeln. Sitzungsberichte der Physikalisch-Medizinischen Gesellschaft zu Würzburg. 1870.

Reviewed by Daniel Diaz-Gil, MD · Last updated March 2026

Medical disclaimer

This tool is for educational and informational purposes only. It is not a substitute for professional clinical judgment. Always independently verify results before making clinical decisions.

Professional Resources — Tools used by pediatricians for cardiac output calculation

Grossman's Cardiac Catheterization HandbookEssential hemodynamic assessment and cath lab reference~$70via Amazon Hemodynamic Rounds, KernCase-based hemodynamic interpretation for the cath lab~$70via Amazon Park's Pediatric Cardiology for Practitioners, 7th EdComprehensive reference for pediatric cardiology evaluation and management~$95via Amazon