Abstract

Observational Study

Differentiation of the Non-dipping Blood Pressure Phenotype in Obstructive Sleep Apnea: An Observational Study

Matilde Valencia-Flores*, Victoria Santiago-Ayala, Margarita Fernández López, Jorge Oseguera Moguel, Gerardo Payró Ramirez, Montserrat Reséndiz-Garcia, Montserrat Memetla-Argumedo, Gabriela Gaytán-Cervantes, Ramón Morales-Navarro, Carlos A. Aguilar-Salinas and Donald L. Bliwise

Published: 15 May, 2025 | Volume 9 - Issue 1 | Pages: 001-008

Background: Absence of nocturnal decrease in Blood Pressure (BP) (“non-dipping”) has been shown to be a strong and independent predictor of cardiovascular events, target organ damage, cardiovascular sequela and cardiovascular mortality. Obstructive Sleep Apnea (OSA) has been associated with non-dipping with an estimated prevalence of approximately 50%, but factors associated with non-dipping in OSA patients remain poorly understood. In this study, we examined clinically relevant variables associated with non-dipping in OSA.
Methods: Patients (n = 35) undergoing overnight valuation for OSA, laboratory-based polysomnography, structured clinical interviews, and comprehensive metabolic and anthropometric evaluations, and ambulatory BP monitoring for 24 hours. Patients were classified into a) dipping BP group or b) non-dipping BP group, based on (a) a nocturnal systolic BP decrease of 10% - 20% or (b) a systolic BP decrease of < 10%. 
Results: Patients had moderate and severe OSA (AHI = 34.8 ± 29.1), and 42.9% demonstrated a non-dipping BP pattern. The severity of OSA measures did not differ between dipping group and non-dipping group. However, Wake after Sleep Onset (WASO) and chronicity of insomnia predicts non-dipping BP independent of demographics, sleep stages, anthropometrics, metabolic measures, or arterial stiffness. 
Conclusion: These findings contribute to a better understanding of the cardiovascular impacts of OSA and indicate that sleep quality should be incorporated into clinical assessments and management of OSA patients.

Read Full Article HTML DOI: 10.29328/journal.ach.1001037 Cite this Article Read Full Article PDF

Keywords:

Obstructive sleep apnea; Insomnia; Non-dipping blood pressure; Sleep quality; Running head; Non-dipping BP in OSA patients with poor sleep quality

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