Biology

Cardiac Output

Calculate the volume of blood pumped per minute.

Cardiac Output = Heart Rate × Stroke Volume

Formula Explanation

Cardiac output is the amount of blood pumped by one ventricle per minute.

Variables Explained

Heart rate = Beats per minute; Stroke volume = Blood pumped per beat.

Solved Example

Heart rate is 70 beats/min and stroke volume is 70 mL/beat.
Cardiac output = 70 × 70 = 4,900 mL/min = 4.9 L/min.

Exam Tip

Use matching units when reporting the result.