Pulmonary vein stenosis: the UK, Ireland and Sweden collaborative study

Area of Science:

• Pediatric Cardiology
• Thoracic Surgery
• Medical Imaging

Background:

• Pulmonary vein stenosis (PVS) is a rare but serious condition in children.
• Its clinical features, morphology, and management are not fully understood.
• PVS is often associated with prematurity and other cardiac anomalies.

Purpose of the Study:

• To describe the clinical features, morphology, management, and outcomes of childhood PVS.
• To identify factors influencing survival and re-intervention rates.
• To inform early intervention strategies for PVS.

Main Methods:

• Retrospective international collaborative study across 19 pediatric cardiology centers.
• Inclusion criteria: PVS cases diagnosed between 1995-2004 with pulmonary veins connected to the left atrium.
• Exclusion criteria: Functionally univentricular hearts and total anomalous pulmonary venous connection.

Main Results:

• 58 cases of PVS identified, 38% with premature delivery and 79% with associated cardiac lesions.
• Disease progression observed from discrete stenosis to diffusely small pulmonary veins; collateral vessels frequently developed.
• Overall 3-year survival was 49%; initial surgical intervention was associated with better freedom from death or re-intervention (HR 0.44).

Conclusions:

• PVS is a complex pediatric disease with uncertain etiology, frequently linked to prematurity.
• Early intervention, especially surgical, may be crucial to prevent irreversible secondary changes and improve outcomes.
• Further research into PVS causes and optimal management is warranted.