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Transcatheter coil closure of pulmonary arteriovenous malformations in children.

Pulmonary arteriovenous fistula (PAVF) is a rare vascular malformation of the lung that may lead to cyanosis, epistaxis, hemoptysis, and neurological deficits or cerebral abscess. The purpose of this study is to assess the effectiveness of percutaneous transcatheter embolization of PAVF in pediatric patients. Transcatheter embolization of PAVF using spring coils was performed in three patients (two males and one female) who presented between 1989 and 1999. The age at presentation ranged from 8 months to 3 years (mean 19.6 months). All patients had cyanosis and clubbing. Neurological, dermatological, or other cardiac manifestations were absent. The arterial oxygen saturations at presentation ranged from 60 to 72% (mean 64%). During eight procedures, multiple coils (total of 41 coils, average 14 coils per patient) were delivered to occlude the fistulas successfully. There was complete occlusion of the fistulas in all patients after the multiple interventions. The aortic saturations increased from a mean of 66% to a mean of 95%. Chest radiographs demonstrated dramatic regression of the pulmonary shadows in all three patients. There were no complications encountered during the procedures or during follow-up. Transcatheter coil embolization of PAVF is a safe and effective method of treatment in the pediatric age group. Patients may require multiple procedures to completely occlude the fistulas. Long-term follow-up is essential to ensure absence of recurrence due to recanalization.