What is normal cardiac index?

Normal CI is 2.5-4.0 L/min/m². CI 4.0 may indicate sepsis or hyperdynamic state.

Why use cardiac index instead of cardiac output?

CI normalizes for body size, allowing comparison between patients of different sizes and serial measurements.

Fick CO = VO2 / (CaO2 - CvO2) × 10, using oxygen consumption divided by arteriovenous oxygen difference.

Calculate cardiac index (CI = CO / BSA) — cardiac output normalized to body surface area.

Use the full interactive calculator below, or

Cardiac Output

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Stroke Volume

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BSA Calculator

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Ejection Fraction

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