Question

In a cardiac output of 5250 ml per minute, with 75 heartbeats per minute, the stroke volume is ______. 

Options

• 55 ml

• 60 ml

• 70 ml

• 80 ml

Answer 1

In a cardiac output of 5250 ml per minute, with 75 heartbeats per minute, the stroke volume is 70 ml.

Explanation:

Cardiac Output = Stroke Volume × Heart rate

∴ The stroke volume = `("Cardiac output/minute")/("ventricular contraction/minute")`

= `(5250ml)/75`

= 70 ml