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.
It is measured from the beginning of the QRS complex to the end of the T wave. At a heart rate of 70 beats per minute it is usually about 0.35 seconds in duration, but the duration of the QT interval is very heart rate dependent. The lower the heart rate is, the longer the QT interval.or example if there is 0.6 seconds between beats, and there are 60 seconds per minute, then the heart rate would be 100 beats per minute [(60 sec/minute / (0.6 sec/beat)]. The RR interval is measured from the peak of one QRS complex (R wave) to the peak of the next QRS complex.