Cardiac Power Index Calculator

Formula

To calculate the Cardiac Power Index (\(CPI\)):

\[ CPI = \frac{CI \cdot MAP}{451} \]

Where:

\(CPI\) is the Cardiac Power Index (W/m²)
\(CI\) is the cardiac index (L/min/m²)
\(MAP\) is the mean arterial pressure (mmHg)

What is Cardiac Power Index?

The Cardiac Power Index (CPI) is a measure of the heart's pumping efficiency, taking into account both the cardiac index and the mean arterial pressure. It is calculated using the formula \(CPI = \frac{CI \cdot MAP}{451}\), where \(CI\) is the cardiac index and \(MAP\) is the mean arterial pressure. A higher CPI indicates better cardiac performance.

Example Calculation 1

Let's assume the following values:

Cardiac Index (\(CI\)) = 3.0 L/min/m²
Mean Arterial Pressure (\(MAP\)) = 90 mmHg

Using the formula:

\[ CPI = \frac{3.0 \cdot 90}{451} \approx 0.5987 \text{ W/m²} \]

The Cardiac Power Index is approximately 0.5987 W/m².

Example Calculation 2

Let's assume the following values:

Cardiac Index (\(CI\)) = 2.5 L/min/m²
Mean Arterial Pressure (\(MAP\)) = 85 mmHg

Using the formula:

\[ CPI = \frac{2.5 \cdot 85}{451} \approx 0.4712 \text{ W/m²} \]

The Cardiac Power Index is approximately 0.4712 W/m².