Índice cardíaco
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The Cardiac Index is a physiological parameter used to assess cardiac function in relation to body size. It is calculated by dividing the Cardiac Output (CO) by the Body Surface Area (BSA). This allows for a fairer comparison of cardiac function between individuals of different sizes. The Cardiac Index is essential in various medical fields, such as cardiology and anesthesiology.
The formula to calculate the Cardiac Index is relatively simple: CI = CO/BSA. However, it is crucial to obtain precise values for Cardiac Output and Body Surface Area. Cardiac Output is the volume of blood pumped by the heart per minute, while Body Surface Area is an estimate of the total body surface. Obtaining accurate values is essential to ensure the accuracy of the Cardiac Index.
The Cardiac Index is particularly useful in clinical situations where it is necessary to evaluate cardiac function in patients with different conditions, such as heart failure, shock, or during surgical procedures. Additionally, it helps monitor the heart's response to different load conditions and detect possible cardiac dysfunctions.
It is essential to be careful when interpreting Cardiac Index results, as normal values may vary according to age, sex, and physical condition of the individual. Furthermore, it is fundamental to consider other physiological parameters in conjunction with the Cardiac Index to obtain a comprehensive assessment of cardiac function.
Frequently asked questions
What is the Cardiac Index?
The Cardiac Index is a physiological parameter that assesses cardiac function in relation to body size.
How is the Cardiac Index calculated?
It is calculated by dividing the Cardiac Output by the Body Surface Area.
What is the Cardiac Index used for?
It is used to evaluate cardiac function in different clinical conditions and monitor the heart's response to different load conditions.
What are the precautions when interpreting the Cardiac Index?
It is essential to consider the individual's age, sex, and physical condition, as well as other physiological parameters.
What are the units of measurement for the Cardiac Index?
The Cardiac Index is expressed in liters per minute per square meter (L/min/m²).