Enter the cardiac index (L/min/m^2) and the mean arterial pressure (mmHg) into the Calculator. The calculator will evaluate the Cardiac Power Index.
Cardiac Power Index Formula
CPI = CI * MAP / 451
Variables:
- CPI is the Cardiac Power Index (W/m^2)
- CI is the cardiac index (L/min/m^2)
- MAP is the mean arterial pressure (mmHg)
To calculate Cardiac Power Index, multiply the cardiac index by the mean arterial pressure, then divide by 451.
How to Calculate Cardiac Power Index?
The following steps outline how to calculate the Cardiac Power Index.
- First, determine the cardiac index (L/min/m^2).
- Next, determine the mean arterial pressure (mmHg).
- Next, gather the formula from above = CPI = CI * MAP / 451.
- Finally, calculate the Cardiac Power Index.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
cardiac index (L/min/m^2) = 14
mean arterial pressure (mmHg) = 12
FAQs
What is the significance of the Cardiac Power Index?
The Cardiac Power Index (CPI) is a measure of the cardiac output in relation to body surface area and mean arterial pressure. It is used to assess the heart’s efficiency and power in pumping blood throughout the body. A higher CPI indicates better cardiac function and perfusion.
How can the Cardiac Index affect the Cardiac Power Index?
The Cardiac Index (CI) directly influences the Cardiac Power Index since CPI is calculated by multiplying the CI by the mean arterial pressure (MAP) and then dividing by a constant. Changes in the CI, which measures the heart’s output per meter squared of body surface area, will proportionally affect the CPI.
Why is the mean arterial pressure important in calculating CPI?
Mean arterial pressure (MAP) is crucial in the CPI formula because it represents the average pressure in a person’s arteries during one cardiac cycle. It is a key determinant of the blood flow through the organs, and combining it with the cardiac index allows for a comprehensive assessment of the heart’s effectiveness in pumping blood.
Can the Cardiac Power Index be used to diagnose heart conditions?
Yes, the Cardiac Power Index can be a valuable tool in diagnosing and monitoring heart conditions. It provides insights into the heart’s ability to deliver blood to the body, and significant deviations from normal values can indicate cardiac dysfunction. However, it should be used in conjunction with other diagnostic tests and clinical findings for a comprehensive evaluation.
