Use this calculation to summarize the supplied cardiovascular measurements with the stated equation and units, or to reproduce a value reported by a monitoring system.

Cardiac output

A finite measured or assumed value greater than or equal to 5e-324, expressed in L/min.

Body surface area

A finite measured or assumed value greater than or equal to 5e-324, expressed in m².

The implementation follows this calculation rule: Compute cardiac index as cardiac output divided by body surface area.^[1]

Cardiac index

The calculated cardiac index in L/min/m².

This is an arithmetic implementation, not a diagnosis. Hemodynamic measurements depend on acquisition method, timing, body size, rhythm, loading conditions, and clinical context; thresholds may differ among guidelines and patient groups. Ratios and percentages become unstable when their denominator is small, uncertain, or defined differently between samples.

Interpret the value with the underlying vital signs and measurement method. Direct clinical assessment, repeat measurements, and related indices such as stroke volume or cardiac index provide context that one summary value cannot.

• BSA DuBois

  Estimate body surface area with the DuBois formula.

• BSA Mosteller

  Estimate body surface area with the Mosteller formula.

• Cardiac Output L/min

  Compute cardiac output from heart rate and stroke volume.