Cardiac Performance and Cardiac Index – What’s the Difference?

Mastering hemodynamics might be difficult, but step one is knowing the terminology. Let’s take a look at cardiac output and cardiac index—the right way to calculate them and why they’re essential.

Heart Performance Formula

 (CO) is the amount of blood pumped by the center per minute. Cardiac output is calculated by multiplying stroke volume by heart rate. is set by preload, contractility, and afterload. The normal range of cardiac output is about 4 to eight L/min, but this could vary depending on the metabolic needs of the body. Cardiac output is very important since it provides oxygen to the cells.
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How to calculate heart efficiency

If a patient’s cardiac output is 75 ml with each contraction and their heart rate is 60 beats per minute, then their cardiac output is 4,500 ml/minute (or 4.5 l/minute).
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Cardiac Index Calculator

 (CI) is an estimate of the worth of cardiac output based on the patient’s size. To find the cardiac index, divide the cardiac output by the person’s body surface area (BSA). The normal range for CI is 2.5 to 4 L/min/m².

How to calculate your Cardiac Index

If the patient’s cardiac output is 4.5 l/min and their body surface area is 1.25 m²its CI could be 3.6 l/min/m². If one other patient has a heart rate of 4.5 l/min but a body surface area of ​​2.5 m²its CI could be 1.8 l/min/m².And
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Both cardiac output and cardiac index are essential to know if a patient’s heart is pumping enough blood and delivering enough oxygen to cells. We also use CO and CI values ​​to oversee some drug therapies, akin to inotropes and vasopressors.
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References to Cardiac Performance and Cardiac Index

Hinkle, J., & Cheever, K. (2021). Brunner and Suddarth’s textbook of medical-surgical nursing, fifteenth edition. Philadelphia: Wolters Kluwer.

King, J., and Lowery, D. R. (2023). Cardiac Physiology, Performance. WÂ StatPearlsStatPearls Publishing House.

Warise L. (2015). Understanding cardiogenic shock: a nursing approach to improving outcomes. Dimensions of Critical Care Nursing: DCCN,AND 34(2), 67–78. https://doi.org/10.1097/DCC.0000000000000095

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