What is Cardiac Index?

Cardiac Index (CI) is a hemodynamic parameter that assesses the heart’s pumping efficiency. It is calculated by relating the cardiac output (the volume of blood pumped by the heart in one minute) to the body surface area. This measurement provides a normalized value for cardiac function, taking into account the patient’s body size. The normal range for cardiac index is typically between 2.5 and 4.0 L/min/m². Values below this range may indicate poor heart function, while values above may suggest a hyperdynamic state.

How to Use the Cardiac Index Calculator

Step 1: Enter your height in centimeters in the “Height” field. This measurement is crucial for calculating your body surface area.

Step 2: Input your weight in kilograms in the “Weight” field. Along with height, this helps determine your body surface area.

Step 3: Enter your stroke volume in milliliters in the “Stroke Volume” field. Stroke volume is the amount of blood pumped by the left ventricle in a single heartbeat.

Step 4: Input your heart rate in beats per minute in the “Heart Rate” field. This is typically measured by counting the number of heartbeats in one minute.

Step 5: Click the “Calculate Cardiac Index” button. The calculator will process your input and display the results.

Step 6: Review the calculated Cardiac Index value, which will be displayed in L/min/m². The tool will also provide an explanation of the result, including your calculated Body Surface Area and Cardiac Output.

Step 7: Interpret the results using the provided explanation. The calculator will indicate whether your Cardiac Index falls within the normal range (2.5 – 4.0 L/min/m²) and provide additional context for values outside this range.

While this calculator can provide valuable insights into your heart’s pumping efficiency, it should not replace professional medical advice. Always consult with a healthcare provider for a comprehensive evaluation of your cardiac health.