Periodic limb movement during sleep is associated with nocturnal hypertension in children

Area of Science:

• Pediatric Sleep Medicine
• Cardiovascular Health in Children
• Hypertension Research

Background:

• Sleep problems significantly impact children's blood pressure (BP).
• The specific link between periodic limb movements during sleep (PLMS) and pediatric BP remains unclear.
• This study investigates ambulatory blood pressure (ABP) in children with and without PLMS.

Purpose of the Study:

• To compare ambulatory blood pressure (ABP) in children diagnosed with periodic limb movements during sleep (PLMS) versus those without.
• To determine the association between PLMS and hypertension risk in a pediatric cohort.
• To explore the relationship between PLM index and BP parameters.

Main Methods:

• A cross-sectional study involving 314 children (mean age 10.4 years).
• Participants underwent overnight polysomnography and ambulatory blood pressure monitoring.
• Hypertension defined as mean systolic or diastolic BP >95th percentile; prehypertension >90th percentile.

Main Results:

• Children with PLMS (n=17) had a significantly higher risk of nocturnal systolic (OR 6.25) and diastolic (OR 4.83) hypertension.
• No significant difference in mean nocturnal BP between groups, but a trend towards higher daytime BP in children with PLMS.
• Significant associations found between PLM index and daytime BP z-scores, and PLM related arousal index (PLMSArI) and nocturnal BP.

Conclusions:

• PLMS is independently associated with various blood pressure elevations in children, particularly nocturnal indices.
• Further research is warranted to elucidate the pathophysiologic mechanisms linking PLMS and BP.
• Investigating the impact of PLMS treatment on pediatric BP is recommended.