Definition of rector for English Language Learners. : 1  a priest or minister who is in charge of a church or parish. : 2  a person who is in charge of a university or school.
Cardiac Cycle. in Physiology. Cardiac events appearing from the beginning of one heart beat to the beginning of next heart beat and repeating themselves successively. â¢ Cardiac cycle time (H.Rate = 75/min) : 0.8 sec. Systole: 0.27 sec. Diastole: 0.53 sec.
Discuss the timing aspects of the cardiac cycle. Since the resting heart rate of a normal adult is about 75 beats/minute, each cycle takes about 0.8 sec. During the first 0.4 seconds, all four chambers are at rest (quiescent period)/. During the next 0.4 seconds, the atria, then the ventricles are in systole.