Sleep apnea: Tracking effects of a first session of CPAP therapy by means of Granger causality

Connectivity between physiological networks is an issue of particular importance for understanding the complex interaction brain-heart. In the present study, this interaction was analyzed in polysomnography recordings of 28 patients diagnosed with obstructive sleep apnea (OSA) and compared with a group of 10 control subjects. Electroencephalography and electrocardiography signals from these polysomnography time series were characterized employing Granger causality computation to measure the directed connectivity among five brain waves and three spectral subbands of heart rate variability. Polysomnography data from OSA patients were recorded before and during a first session of continuous positive air pressure (CPAP) therapy in a split-night study. Results showed that CPAP therapy allowed the recovery of inner brain connectivities, mainly in subsystems involving the theta wave. In addition, differences between control and OSA patients were established in connections that involve lower frequency ranges of heart rate variability. This information can be potentially useful in the initial diagnosis of OSA, and determine the role of cardiac activity in sleep dynamics based on the use of three subbands of heart rate variability. © 2019 Elsevier B.V.

• Fecha de publicación: 2020
• Institución: Universidad del Rosario
• Repositorio: Repositorio EdocUR - U. Rosario
• Idioma: eng
• OAI Identifier: oai:repository.urosario.edu.co:10336/23767
• Acceso en línea: https://doi.org/10.1016/j.cmpb.2019.105235; https://repository.urosario.edu.co/handle/10336/23767
• Palabra clave: Atmospheric pressure; Electroencephalography; Electrophysiology; Patient monitoring; Patient treatment; Sleep research; Statistical tests; Air pressures; Brain connectivity; Cardiac activity; Granger Causality; Heart rate variability; Lower frequencies; Obstructive sleep apnea; Tracking effects; Heart; Adult; Aged; Article; Causality; Clinical article; Electrocardiography; Electroencephalogram; Electroencephalography; Female; Heart rate variability; Human; Male; Polysomnography; Positive end expiratory pressure; Retrospective study; Sleep disordered breathing; Theta rhythm; Brain-heart network; Continuous positive air pressure; Physiological coupling
• License: Abierto (Texto Completo)