cardiac_power_output: Cardiac Power Output (CPO)

In cliot: Clinical Indices and Outcomes Tools

Cardiac Power Output (CPO)

Description

Calculates Cardiac Power Output (CPO), a hemodynamic metric that integrates both pressure and flow (Cardiac Output x Mean Arterial Pressure) to assess the pumping ability of the heart. Measured in Watts, it is a potent predictor of mortality in patients with cardiogenic shock.

Usage

cardiac_power_output(mean_arterial_pressure, cardiac_output)

Arguments

mean_arterial_pressure	Numeric. Mean Arterial Pressure (MAP) in mmHg.
cardiac_output	Numeric. Cardiac Output in L/min.

Value

A list containing:

CPO_Watts	The calculated Cardiac Power Output in Watts.
Interpretation	Prognostic interpretation based on the critical threshold of 0.6 Watts derived from the SHOCK trial registry.

References

Fincke R, Hochman JS, Lowe AM, et al. Cardiac power is the strongest hemodynamic correlate of mortality in cardiogenic shock: a report from the SHOCK Trial Registry. J Am Coll Cardiol. 2004;44(2):340-348. doi:10.1016/j.jacc.2004.03.060

Examples

# Example 1: Cardiogenic Shock (Poor Prognosis)
# MAP 60 mmHg, CO 3.0 L/min
# CPO = (60 * 3.0) / 451 = 0.40 W
cardiac_power_output(60, 3.0)

# Example 2: Improved Hemodynamics
# MAP 75 mmHg, CO 4.5 L/min
# CPO = (75 * 4.5) / 451 = 0.75 W
cardiac_power_output(75, 4.5)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.