What is cardiac output?

Cardiac output (CO) is the volume of blood pumped by the heart per minute, calculated as stroke volume × heart rate. It's a key indicator of cardiovascular function.

What is cardiac index?

Cardiac index (CI) is cardiac output normalized for body surface area (CO/BSA). It provides a more accurate assessment by accounting for body size differences.

What is the Du Bois formula?

Du Bois formula calculates body surface area (BSA): BSA = 0.007184 × height^0.725 × weight^0.425, where height is in cm and weight in kg.

What causes low cardiac output?

Low CO can result from heart failure, hypovolemia, severe valvular disease, arrhythmias, or cardiogenic shock. Medical evaluation is necessary.

Cardiac Output Calculator

Calculate cardiac output, cardiac index, and assess heart function

Cardiac Parameters

Heart Rate (bpm)

Stroke Volume (mL/beat)

Body Weight (kg)

Height (cm)

Gender

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Ready to Calculate

Enter cardiac parameters to calculate output

How to Use This Calculator

Measure Heart Rate

Obtain heart rate from ECG or pulse measurement

Enter Stroke Volume

Input stroke volume from echocardiography or catheterization

Provide Body Measurements

Enter weight, height, and gender for BSA calculation

Review Results

Analyze cardiac output, cardiac index, and clinical interpretation

Cardiac Output Tips

Cardiac index normalizes cardiac output to body surface area

Normal CI range is 2.5-4.0 L/min/m² for adults

Low cardiac index may indicate heart failure or shock

Stroke volume reflects ventricular contractility