Question

A heart rate of 90 bpm (beats per minute) means the duration of one cardiac cycle is about ………seconds.

• A. 0.67
• B. 1.0
• C. 1.5
• D. 1.8

Hint:

Cardiac cycle duration = \( \frac{60}{\text{heart rate in bpm}} \)

Answer 1

The Correct Option is A

Heart rate of 90 bpm implies 90 beats in 60 seconds. So, the duration of one cardiac cycle is: \[ \frac{60}{90} = 0.67 \text{ seconds} \]