Birth weight and cardiac structure in children

Area of Science:

• Cardiology
• Developmental Biology
• Epidemiology

Background:

• Epidemiologic studies link impaired fetal growth to increased adult coronary heart disease risk.
• Mechanisms underlying this association remain largely unknown.
• Investigating intrauterine growth's impact on cardiac structure is crucial.

Purpose of the Study:

• To determine if restricted intrauterine growth affects cardiac structure in children.
• To explore potential long-term cardiovascular consequences of fetal growth restriction.

Main Methods:

• Echocardiography performed on 216 children at age 9, with prior birth measurements.
• Measured coronary artery diameters (left, right, total), aortic root, left atrial, left ventricular diameters, and left ventricular mass.
• Analyzed associations between birth weight and cardiac dimensions, adjusting for covariates.

Main Results:

• Children with lower birth weight had smaller total coronary artery diameter, aortic root diameter, and left ventricular outflow tract diameter.
• Each SD increase in birth weight correlated with increased coronary artery and aortic dimensions.
• Adjusted analyses controlled for gender, gestational age, and current/maternal anthropometrics.

Conclusions:

• Impaired fetal growth appears to have lasting effects on cardiac structure.
• Findings suggest a potential mechanism linking low birth weight to higher coronary heart disease risk in adulthood.