Circadian blood pressure dysregulation in children with obstructive sleep apnea

Area of Science:

• Pediatric Cardiology
• Sleep Medicine
• Circadian Biology

Background:

• Obstructive sleep apnea (OSA) is known to negatively impact blood pressure (BP) regulation.
• Disruptions in normal circadian BP patterns are a potential consequence of OSA.
• Understanding these disruptions in children is crucial for managing long-term cardiovascular health.

Purpose of the Study:

• To investigate and compare 24-hour circadian BP rhythms in children diagnosed with OSA versus healthy controls.
• To identify specific alterations in BP patterns, such as timing of peaks and nadirs, associated with OSA in pediatric populations.

Main Methods:

• Utilized 24-hour ambulatory BP monitoring and actigraphy in children aged 5-14 years.
• Employed shape-invariant statistical models to analyze and compare circadian BP patterns between OSA and control groups.
• Quantified parameters including time of BP peaks and time arrived at peak BP velocity (TAPV).

Main Results:

• Children with moderate-to-severe OSA (MS-OSA) demonstrated significantly earlier TAPV for both systolic BP (SBP) and diastolic BP (DBP) compared to controls.
• The MS-OSA group exhibited earlier BP peaks and nadirs during daytime and evening hours.
• Elevated SBP and DBP were observed in the MS-OSA group during specific periods, with a higher prevalence of "non-dipping" patterns.

Conclusions:

• Pediatric patients with MS-OSA exhibit significant alterations in circadian BP patterns, characterized by earlier BP peaks, nadirs, and TAPV.
• These circadian BP disturbances are likely integral to the development of BP dysregulation in children with OSA.
• Findings underscore the importance of assessing circadian BP rhythms in the management of pediatric OSA.