When the HR is 72 beats per min, what would be the duration of cardiac cycle?: (A) 445 ms, (B) 1450 ms, (C) 700 ms, (D) 833 ms
Answer is D. Cardiac cycle: - 72 beats occur in - 60sec. 1 beat would occur in - 60/72 1 beat - 0.833 sec (~ 833 ms) (0.0139 minute per beat).