B-type natriuretic peptide levels at birth predict cardiac dysfunction in neonates

Area of Science:

• Neonatal Medicine
• Cardiology
• Biomarkers

Background:

• B-type natriuretic peptide (BNP) in umbilical cord blood (UCB-BNP) and amniotic fluid (AF-BNP) may indicate neonatal cardiac dysfunction.
• Limited research exists on clinical factors influencing UCB-BNP and AF-BNP levels.

Purpose of the Study:

• To assess if UCB-BNP and AF-BNP predict cardiac dysfunction and hypotension in preterm infants.
• To examine associations between BNP levels and clinical factors.

Main Methods:

• Measured UCB-BNP and AF-BNP in 320 and 195 neonates, respectively.
• Utilized stepwise multiple regression analysis to identify determinants of UCB-BNP.
• Determined predictive cut-off values for UCB-BNP and AF-BNP.

Main Results:

• Significantly higher UCB-BNP and AF-BNP levels were observed in infants treated with dopamine.
• Gestational age, SGA, asphyxia, and chorioamnionitis were independent determinants of UCB-BNP.
• Cut-off values of >90 pg/mL (UCB-BNP) and >36 pg/mL (AF-BNP) showed high sensitivity and specificity for predicting dopamine requirement.

Conclusions:

• Elevated UCB-BNP and AF-BNP levels are predictive of neonatal cardiac dysfunction shortly after birth.
• These BNP measurements can aid in identifying neonates requiring cardiovascular support.