Question

Choose the correct answer from the alternatives given.
The normal resting value of cardiac output is:

• A. 5 litres per second
• B. 5 litres per minute
• C. 20 litres per minute
• D. 20 litres per hour

Answer 1

The correct option is B 5 litres per minute

The cardiac output is simply the amount of blood pumped by the heart per minute. Necessarily, the cardiac output is the product of the heart rate, which is the number of beats per minute, and the stroke volume, which is amount pumped per beat.

Cardiac Output = Heart rate × Stroke volume = 72 × 70 = 5040 ml (5 litres) per minute.

So, the correct option is '5litres per minute'.