Normal values of aortic root measurements in neonates

Area of Science:

• Neonatal medicine
• Pediatric cardiology
• Medical imaging

Background:

• Accurate aortic root diameter measurements are crucial for assessing neonatal cardiovascular health.
• Establishing normative data for aortic root dimensions in neonates is essential for identifying potential abnormalities.

Purpose of the Study:

• To determine the relationship between birth weight and aortic root diameter in neonates.
• To establish reference ranges for aortic root diameter in preterm and term neonates across various birth weight categories.

Main Methods:

• M-mode echocardiography was used to measure aortic root diameter in early diastole.
• Measurements were performed within the first week of life in 172 preterm and 228 term neonates.
• Neonates were stratified into 500-g birth weight subgroups, with at least 40 infants per subgroup.

Main Results:

• A linear increase in aortic root diameter was observed with increasing birth weight.
• Aortic root diameter ranged from 0.63 +/- 0.04 cm in newborns weighing 750-1249 g to 1.06 +/- 0.06 cm in those weighing 4250-4750 g.
• Normative data were established for different birth weight strata.

Conclusions:

• Birth weight is a significant determinant of aortic root diameter in neonates.
• The findings provide valuable reference standards for the echocardiographic assessment of the neonatal aortic root.
• These data can aid in the early detection of cardiovascular conditions in newborns.