Study of relationship between heart rate variability and autonomic function using cold pressor test for Malaysian population

This paper investigates HRV response of healthy subject during cold pressor test using AR spectral analysis with Burg estimation. Cold pressor test is one of the autonomic function tests performed by immersing the hand into cold water. In this study, ECG was recorded from 26 young adults; 9 males and 17 females with age ranging from 20-40. Autoregressive estimated by Burg is used to compute the power spectral density of the R-R interval. From the ongoing results, 22 subjects show an increase of LFnu and a decrease of HFnu during cold pressor while four subjects show opposite response. For LF/HF ratio, nine subjects show values greater than one which indicates a parasympathetic predominance during the CP while 17 from them indicate less than one, reflecting sympathetic predominance.