Prone sleeping affects cardiovascular control in preterm infants in NICU

Area of Science:

• Neonatal Physiology
• Cardiovascular Regulation
• Autonomic Nervous System

Background:

• Prone sleeping is utilized in neonatal intensive care to enhance respiratory function in preterm infants.
• Concerns exist regarding the potential negative impact of prone positioning on autonomic cardiovascular control in this vulnerable population.

Purpose of the Study:

• To investigate the effects of the prone sleeping position on cardiovascular control in preterm infants receiving intensive care.
• To assess autonomic measures including heart rate variability, blood pressure variability, and baroreflex sensitivity.

Main Methods:

• Fifty-six preterm infants (extremely preterm: 24-28 weeks GA; very preterm: 29-34 weeks GA) were studied weekly for 3 weeks.
• Cardiovascular parameters including heart rate and blood pressure were recorded in both prone and supine positions during sleep.
• Autonomic function was assessed using frequency analysis of heart rate variability (HRV), blood pressure variability (BPV), and baroreflex sensitivity (BRS).

Main Results:

• Prone sleeping was associated with increased heart rate and reduced baroreflex sensitivity compared to the supine position.
• High-frequency blood pressure variability (HF BPV) was elevated in the prone position.
• Extremely preterm infants exhibited the lowest heart rate variability and baroreflex sensitivity, alongside the highest HF BPV.

Conclusions:

• Prone sleeping appears to attenuate cardiovascular control in preterm infants during early postnatal life.
• Findings suggest potential implications for blood pressure regulation in preterm infants managed in intensive care settings.