What is the normal range for Cardiac Index (CI)?

The normal range for Cardiac Index (CI) is 2.5 to 4.0 L/min/m². This measurement is crucial as it evaluates the efficiency of the heart in pumping blood relative to the size of the individual. A CI within this range indicates that the heart is functioning adequately to supply the body's needs based on its surface area.

Cardiac Index is calculated by dividing cardiac output (the total volume of blood the heart pumps per minute) by the individual's body surface area. A CI below 2.5 may suggest inadequate cardiac output in relation to body size, indicative of potential heart failure or other cardiovascular issues. Conversely, a CI above 4.0 could imply overactive cardiac function or possible shock states. Understanding the normal range helps healthcare providers assess and manage cardiac function in a variety of clinical scenarios, particularly in acute care settings where close monitoring is essential.