Analysis of beat-to-beat blood pressure variability response to the cold pressor test in the offspring of hypertensive and normotensive parents.
Abnormal autonomic nervous regulation has an important role in the development of hypertension. As to whether blood pressure (BP) or BP variability represents the proper characteristics for predisposition to hypertension in Chinese young adults remains controversial. We studied the properties of the indices extracted from beat-to-beat BP during a 13 min cold pressor test (CPT). In this study, 69 Chinese young adults including 34 offspring of hypertensive parents (OHPs; 25.6±2.5 years) and 35 offspring of normotensive parents (ONPs; 25.3±2.3 years) were analyzed. We assessed the differences between the two groups regarding mean beat-to-beat BP and variability indices. Beat-to-beat BP variability indices included time-domain indices and frequency-domain indices. Our results showed that the differences in beat-to-beat systolic BP and mean BP levels between the OHPs and the ONPs were statistically significant (P<0.05). Furthermore, more BP variability indices in the frequency domain were significantly different between the two groups. We concluded that BP variability was superior to BP as an index to evaluate the cardiovascular and sympathetic reactivity to the CPT. Moreover, compared with time-domain BP variability, we found more differences in frequency-domain BP variability between the two groups, thus indicating that frequency-domain BP variability may be a potential index of predisposition to hypertension.
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.|Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, China.
Dan
D
Wu
Department of Cardiology, Guangzhou General Hospital of Guangzhou Military Region, PLA, Guangzhou, China.
Lin
L
Xu
Centre for Biomedical Engineering and School of Electrical and Electronic Engineering, University of Adelaide, Adelaide, SA, Australia.
Derek
D
Abbott
Institute of Cardiovascular Medicine and Research, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China.
William Kongto
WK
Hau
Department of Neurology, Shenzhen Second People's Hospital, Shenzhen, China.
Lijie
L
Ren
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
Heye
H
Zhang
School of Medicine, Western Sydney University, Sydney, NSW, Australia.
Kelvin K L
KKL
Wong
D000328:Adult; D001794:Blood Pressure; D003080:Cold Temperature; D006339:Heart Rate; D006801:Humans; D006973:Hypertension / Q000235:genetics*; D055815:Young Adult