“…High heart rate and low heart rate variability during sleep may indicate psychological or medical conditions, for example, anxiety, obstructive sleep apnea, and atrial fibrillation (Bonnet & Arand, 2010; Fujiki et al, 2013; Palatini & Julius, 1997; Silvani, 2019; Stein & Kleiger, 1999; Stein & Pu, 2012; Task Force of the European Society of Cardiology and the North American Society of Pacing Electrophysiology, 1996; Tsuji et al, 1994). In addition, literature shows that HRV, EDA levels, and body movement are highly correlated with various phases of sleep (Borazio & Laerhoven, 2012; Kurihara & Watanabe, 2012; Onton et al, 2016, 2018; Paragliola & Coronato, 2017; Sadeghi et al, 2019; Sano et al, 2014). It was worn all day and night for the home monitoring period, except for 1 hr each day to charge the device.…”