ANATOMY

Detailed explanation-1: -The heart beats 72 times per minute, i.e., that many cardiac cycles are performed per minute. From this it could be deduced that the duration of a cardiac cycle is 0.8 seconds. During a cardiac cycle, each ventricle pumps out approximately 70 mL of blood, which is called the stroke volume.

Detailed explanation-2: -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-3: -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-4: -Simply identify two consecutive R waves and count the number of large squares between them. By dividing this number into 300 (remember, this number represents 1 minute) we are able to calculate a person’s heart rate. Rate = 300 / number of large squares between consecutive R waves.

Detailed explanation-5: -The normal duration of the cardiac cycle is 0.8 second. Atrial systole-0.1 sec. Atrial diastole-0.7 sec.