Cardiac cycle duration in man is_______________?
Correct answer: B. 0.8 seconds
- A. 0.4 seconds
- B. 0.8 seconds
- C. 1.2 seconds
- D. 1.6 seconds
Explanation
A normal cardiac cycle lasts about 0.8 seconds at a heart rate of 75 beats per minute, calculated as 60 divided by 75. Faster heart rates shorten the cycle, especially the diastolic portion.
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