NCT03558893

Sleep and Circadian Mechanisms of Non-dipping Blood Pressure

Sleep and Circadian Mechanisms Contributing to Nocturnal Non-dipping Blood Pressure

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (actual)
• Sponsor: Oregon Health and Science University · Academic / Other
• Sex: All
• Age: 40 Years – 60 Years
• Healthy volunteers: Accepted

Summary

This study will be the first to distinguish the relative contributions of sleep, circadian and behavioral mechanisms to the non-dipping BP profile in Black adults and will lay the groundwork for optimizing therapies dependent on mechanisms, such as targeting sleep, targeting circadian rhythmicity, or targeting behaviors, and raising the possibility that ideal therapy for hypertension (HTN) may differ by race. This research will ultimately help to improve health and survival in black populations with HTN.

Detailed description

By studying standardized behaviors and regulators of BP during sleep and behavioral stresses across all circadian phases, this protocol will allow us specifically to: 1. To determine if poor sleep, while controlling for circadian phase, contributes to the higher overall BP and reduced nocturnal drop in BP in Blacks compared to Whites. 2. To determine if reduced BP responses to standardized behavioral changes across the day and night contribute to the higher overall BP and reduced nocturnal drop in BP in Blacks compared to Whites. 3. To determine if reduced circadian amplitude of BP contributes to the higher overall BP and reduced nocturnal drop in BP in Blacks compared to Whites.

Conditions

• Hypertension
• Cardiovascular Risk Factor

Interventions

Type	Name	Description
BEHAVIORAL	Forced Desynchrony	All sleep opportunities and other activities will be scheduled by the experimenter so that by the end of the study these activities are spread evenly across all phases of the internal body clock.

Timeline

• Start date: 2018-12-01
• Primary completion: 2024-12-31
• Completion: 2024-12-31
• First posted: 2018-06-15
• Last updated: 2025-05-15

Locations

1 site across 1 country: United States