1. What is Cardiac Power Output?

Cardiac Power Output (CPO) is a hemodynamic parameter that represents the heart's ability to generate power. It is calculated as the product of mean arterial pressure (MAP) and cardiac output (CO), divided by 451 to convert to watts.

2. How Does the Calculator Work?

The calculator uses the CPO formula:

Where:

• \( MAP \) — Mean arterial pressure (mmHg)
• \( CO \) — Cardiac output (L/min)
• 451 — Conversion factor to convert to watts

Explanation: This equation quantifies the heart's mechanical power output by combining pressure and flow components of cardiovascular function.

3. Importance of CPO Calculation

Details: CPO is a valuable prognostic indicator in heart failure and critical care settings. It provides a comprehensive assessment of cardiac function that incorporates both pressure generation and flow capacity.

4. Using the Calculator

Tips: Enter mean arterial pressure in mmHg and cardiac output in L/min. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal CPO value?
A: Normal CPO typically ranges between 0.8-1.2 W. Values below 0.6 W are often associated with poor prognosis in heart failure patients.

Q2: How is MAP calculated?
A: Mean arterial pressure can be estimated as: MAP = diastolic BP + 1/3(systolic BP - diastolic BP).

Q3: What are the clinical applications of CPO?
A: CPO is used in assessing heart failure severity, guiding therapy in cardiogenic shock, and evaluating response to inotropic support.

Q4: How does CPO differ from cardiac work?
A: While related, CPO specifically measures power (work per unit time), while cardiac work refers to the total energy expenditure.

Q5: When should CPO be monitored?
A: CPO is particularly valuable in critical care settings, during management of advanced heart failure, and when assessing response to cardiovascular medications.