Unusual hemodynamic changes in an infant with a restrictive ventricular septal defect

Area of Science:

• Pediatric Cardiology
• Congenital Heart Disease
• Cardiac Surgery

Background:

• A 7-month-old infant presented with a restrictive membranous ventricular septal defect (VSD) partially occluded by a septal aneurysm.
• The infant was initially asymptomatic, with the VSD anomaly noted incidentally.

Observation:

• At 13 months, the infant developed sudden, severe pulmonary hypertension without overt signs of heart failure.
• Cardiac catheterization revealed systemic pulmonary artery pressure and a significant left-to-right shunt.

Findings:

• The clinical presentation suggests a VSD enlargement, likely due to the rupture of the pre-existing membranous septal aneurysm.
• Surgical intervention involving VSD closure resulted in a 50% reduction in pulmonary arterial pressure.

Implications:

• Rupture of a septal aneurysm is a rare but critical complication leading to significant hemodynamic changes.
• Prompt surgical management is crucial for improving outcomes in cases of VSD enlargement secondary to septal aneurysm rupture.