Validation of Ambulatory Sleep Test (WP200/U) Compared In-lab Sleep Testing in Cardiac Subjects

Subjects with cardiac disorders, referred to the sleep lab will be offered to participate in the study. Subjects will be asked to sign an informed consent form and will be screened for inclusion exclusion criteria. Subject demographic and medical information will be acquired from the subject himself and/or from the subject's medical chart and will be recorded on the appropriate pre-study electronic case report forms. The subjects will be admitted to the clinical sleep laboratory for one night, during which they will undergo conventional full night PSG recording with the standard PSG channels. The WP 200/WP200U wrist device, which includes the PAT and pulse oximeter probes will be worn on the wrist. The investigator will not have access to the WP200/WP200U data while scoring the PSG data. During the study recording, the WP200/WP200U data will be recorded inside the device, without being displayed on the PSG monitor. Furthermore, the WP200/WP200U analysis is done automatically without knowledge of the PSG scoring results.