Neonatal cardiac dysfunction in intrauterine growth restriction

Area of Science:

• Neonatal cardiology
• Fetal development
• Cardiovascular physiology

Background:

• Early postnatal cardiovascular effects of intrauterine growth restriction (IUGR) are not fully understood.
• Investigating IUGR's impact on neonatal myocardial function and adaptation is crucial.

Purpose of the Study:

• To evaluate the effect of IUGR on neonatal myocardial function.
• To assess cardiovascular adaptation to extrauterine life in IUGR neonates.

Main Methods:

• Compared echocardiographic parameters in 30 IUGR and 30 appropriate-for-gestational age (AGA) neonates.
• Utilized conventional and tissue Doppler echocardiography on postnatal days 2 and 5.

Main Results:

• IUGR neonates exhibited relative interventricular septum hypertrophy and left ventricular dilatation.
• Increased left myocardial performance index (MPI) was observed in IUGR infants.
• IUGR neonates showed altered patterns in left ventricular stroke volume, cardiac output, MPI, and heart rate compared to AGA infants, with decreased cardiac output.

Conclusions:

• IUGR neonates present with cardiac morphological changes and subclinical myocardial dysfunction.
• These alterations contribute to an altered cardiovascular adaptation pattern after birth.