MICROANATOMY

Detailed explanation-1: -At 100 bpm heart rate the cardiac cycle duration is = 600 msec.

Detailed explanation-2: -A healthy human heart beats 72 times per minute which states that there are 72 cardiac cycles per minute. The cardiac cycle involves a complete contraction and relaxation of both the atria and ventricles and the cycle last approximately 0.8 seconds.

Detailed explanation-3: -Duration of Cardiac Cycle: Hence when the heart rate is increased to 120 beats per minute, the cardiac cycle duration will be about 0.5 sec.

Detailed explanation-4: -Assuming a healthy heart and a typical rate of 70 to 75 beats per minute, each cardiac cycle, or heartbeat, takes about 0.8 second to complete the cycle.

Detailed explanation-5: -The total duration of the cardiac cycle, including systole and diastole, is the reciprocal of the heart rate. For example, if heart rate is 72 beats/min, the duration of the cardiac cycle is 1/ 72 beats/ min about 0.0139 minutes per beat, or 0.8 second per beat.