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J. Clin. Med. 2019, 8(1), 12; https://doi.org/10.3390/jcm8010012

Hypertension Assessment Using Photoplethysmography: A Risk Stratification Approach

1
School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, China
2
School of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
3
Faculty of Medicine, University of British Columbia, Vancouver, BC V1Y 1T3, Canada
4
BC Children’s and Women’s Hospital, Vancouver, BC V6H 3N1, Canada
*
Authors to whom correspondence should be addressed.
Received: 14 November 2018 / Revised: 29 November 2018 / Accepted: 14 December 2018 / Published: 21 December 2018
(This article belongs to the Section Vascular Medicine)
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Abstract

Hypertension is a common chronic cardiovascular disease (CVD). Early screening and diagnosis of hypertension plays a major role in its prevention and in the control of CVDs. Our study discusses the early screening of hypertension while using the morphological features of photoplethysmography (PPG). Numerous morphological features of PPG and its derivative waves were defined and extracted. Six types of feature selection methods were chosen to screen and evaluate these PPG morphological features. The optimal features were comprehensively analyzed in relation to the physiological processes of the cardiovascular circulatory system. Particularly, the intrinsic relation and physiological significance between the formation process of systolic blood pressure (SBP) and PPG morphology features were analyzed in depth. A variety of linear and nonlinear classification models were established for the comparison trials. The F1 scores for the normotension versus prehypertension, normotension and prehypertension versus hypertension, and normotension versus hypertension trials were 72.97%, 81.82%, and 92.31%, respectively. In summary, this study established a PPG characteristic analysis model and established the intrinsic relationship between SBP and PPG characteristics. Finally, the risk stratification of hypertension at different stages was examined and compared based on the optimal feature subset. View Full-Text
Keywords: Hypertension; systolic blood pressure; photoplethysmograph; feature selection; risk classification Hypertension; systolic blood pressure; photoplethysmograph; feature selection; risk classification
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Liang, Y.; Chen, Z.; Ward, R.; Elgendi, M. Hypertension Assessment Using Photoplethysmography: A Risk Stratification Approach. J. Clin. Med. 2019, 8, 12.

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