What does CI stand for in the context of cardiac function?

In the context of cardiac function, CI stands for Cardiac Index. The Cardiac Index is an important measurement used to assess the efficiency of the heart by relating the cardiac output to the body surface area (BSA). It standardizes cardiac output against the individual’s body size, providing a more accurate assessment of heart function in comparison to using cardiac output alone.

A normal cardiac index typically ranges between 2.5 to 4.0 L/min/m². This value helps clinicians evaluate how well the heart is meeting the body's demands for oxygen and nutrients, particularly in critically ill patients or those with heart disease. If the cardiac index is low, it may indicate that the heart is not pumping effectively, which can lead to inadequate perfusion of tissues.

Understanding the Cardiac Index is vital for monitoring heart performance, evaluating treatment efficacy, and guiding clinical decisions in managing various cardiovascular conditions.