Complexity Analysis on 24h Heart Rate Variability

This paper mainly analyzed 24h Heart Rate Variability (HRV) with non-linear method. A non-linear parameter-complexity was extracted from HRV recordings. Coronary heart disease (CHD) patients and healthy controls were two groups for study. HRV data of CHD patients were recorded by ECG holter monitor, and data of Healthy controls were from MIT-BIH database. Complexity was extracted from 24 sections of 24h HRV recordings divided in time one by one hour. By comparison, complexity values in 24 time sections showed much difference between Healthy controls and CHD patients. The results indicated there was some difference in status of cardiovascular system of two groups, and cardiovascular system of healthy controls could adjust itself better to enviroment than CHD patients in some degree.