[Closure of a large arteriovenous malformation of the left lung in a patient after Fontan procedure (case report)].

The development of arteriovenous pulmonary malformations quite often (up to 25% of all cases) occurs when applying a cavopulmonary anastomosis (Glenn procedure) and performing the Fontan procedure. This can be directly related to both the restructuring of hemodynamics in the hepatic segment of the venous system, with subsequent changes in the liver function against this background and the non-entry of hepatic enzymes - antiangiogenic factors into the pulmonary circulation, and the formation of a 'non-pulsating' pulmonary blood flow. Endovascular treatment in this case is minimally traumatic and demonstrates high immediate efficiency, however, the long-term outcomes of these interventions have been poorly investigated, with the studied groups of patients being extremely small. Today, embolization therapy is one of the main treatment options in patients with an arteriovenous malformation, especially when a vascular anomaly is located deep in the lung parenchyma. The proposed method is minimally invasive, relatively easy to perform and yields good results.