Right and left heart size and function in infants with symptomatic coarctation

Area of Science:

• Pediatric Cardiology
• Cardiovascular Physiology
• Congenital Heart Disease

Background:

• Coarctation of the aorta is a critical congenital heart defect.
• Infants with symptomatic coarctation experience significant hemodynamic alterations.
• Understanding ventricular function is crucial for managing this condition.

Purpose of the Study:

• To assess right and left heart function in infants with symptomatic coarctation of the aorta.
• To correlate cardiac volumes, ejection fractions, and outputs with clinical and hemodynamic findings.
• To differentiate between temporary and permanent ventricular dysfunction.

Main Methods:

• Biplane cineangiocardiography was used to determine cardiac volumes and outputs.
• Patients were stratified into two age groups (neonates and older infants).
• Echocardiography assessed left ventricular function postoperatively.

Main Results:

• Neonates (group 1) showed depressed left ventricular ejection fraction and output with right heart enlargement.
• Older infants (group 2) had less impaired left heart function and developed left ventricular hypertrophy.
• Postoperative echocardiograms indicated normal or improved left ventricular function.

Conclusions:

• Ventricular dysfunction in symptomatic coarctation of the aorta is largely afterload-induced.
• The findings suggest reversible impairment of left ventricular contractile function.
• Early diagnosis and management are vital for improving outcomes in affected infants.