Comorbid Insomnia and Sleep Disordered Breathing in Patients Undergoing Cardiac Rehabilitation

Home polysomnography will be conducted using the scalable, modular Embletta system. Trained staff will instrument the participants in the evening and perform biocalibration to ensure optimal data quality

A water resistant accelerometer with light sensor and event marker will be worn on the nondominant wrist for approximately 7 days. Activity counts from the device will be analyzed by proprietary software algorithms for determination of the following: sleep onset, sleep offset, total sleep time, total wake time, and sleep efficiency.16 Daytime sleep periods will be also scored to determine frequency and duration of naps. Daily data will be averaged across the 7-day period, as well as separately for weekdays and weekend, to compute measures of habitual sleep patterns.