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.
Heart Rate Variability (HRV) refers to the different measurements that can be derived from the intervals between normal heart beats on a continuous ECG recordings. Analysis of Heart Rate Variability (HRV) and other ECG-based analyses provide information about the functioning of the cardiac autonomic nervous system.