Blood pressure in sleep disordered breathing

Area of Science:

• Pediatric Cardiology
• Sleep Medicine
• Cardiovascular Physiology

Background:

• Sleep disordered breathing (SDB) is increasingly recognized in children.
• The relationship between SDB and cardiovascular parameters like blood pressure (BP) requires further investigation in pediatric populations.
• Adenotonsillar hypertrophy is a common cause of SDB in children.

Purpose of the Study:

• To investigate the association between blood pressure (BP) and sleep disordered breathing (SDB) in children.
• To determine if SDB severity, measured by polysomnography indices, correlates with BP in pediatric patients.

Main Methods:

• Blood pressure (BP) was measured during polysomnography in 23 children with suspected SDB and adenotonsillar hypertrophy.
• BP indices were normalized to age-related changes and analyzed against SDB measures including desaturation time, SaO2 nadir, apnea-hypopnea index (AHI), and arousal index.
• Multiple regression analysis was used to identify predictors of BP indices.

Main Results:

• The diastolic BP index during REM sleep significantly correlated with the apnea-hypopnea index (AHI).
• Children with an AHI of 10 or more exhibited significantly higher systolic and diastolic BP indices during wakefulness and REM sleep compared to those with lower AHI.
• Age, BMI, and AHI were significant predictors of the systolic BP index during REM sleep.

Conclusions:

• Blood pressure in pediatric SDB patients is positively correlated with the degree of SDB severity.
• SDB severity, particularly the AHI, is a significant factor influencing BP in children.
• These findings highlight the cardiovascular implications of SDB in pediatric populations.