R Glenn Weaver, M V S Chandrashekhar, Bridget Armstrong, James W White, Olivia Finnegan, Aliye B Cepni, Sarah Burkart, Michael Beets, Elizabeth L Adams, Massimiliano de Zambotti, Gregory J Welk, Srihari Nelakuditi, David Brown, Russ Pate, Yuan Wang, Rahul Ghosal, Zifei Zhong, Hongpeng Yang
STUDY OBJECTIVES: Evaluate wrist-placed accelerometry predicted heartrate compared to electrocardiogram (ECG) heartrate in children during sleep. METHODS: Children (n=82, 61% male, 43.9% Black) wore a wrist-placed Apple Watch Series 7 (AWS7) and ActiGraph GT9X during a polysomnogram. 3-Axis accelerometry data was extracted from AWS7 and the GT9X. Accelerometry heartrate estimates were derived from jerk (the rate of acceleration change), computed using the peak magnitude frequency in short time Fourier Transforms of Hilbert transformed jerk computed from acceleration magnitude...
May 3, 2024: Sleep