Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Cardiac index
Introduction
Cardiac index (CI) is a vasodynamic parameter that relates the cardiac output (CO) to body surface area (BSA), thus relating heart performance to the size of the individual. The unit of measurement is litres per minute per square metre (l/min/m^2). The index is usually calculated using the following formula formula:
- <math>CI = \frac{CO}{BSA} = \frac{SV*HR}{BSA}</math>
CI=Cardiac Index BSA=Body Surface Area SV=Stroke Volume HR=Heart Rate
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]