Bidirectional Glenn with interruption of antegrade pulmonary
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Ideally, patients undergoing superior cavopulmonary connection for a functionally univentricular heart should have an antegrade pulmonary blood flow to maintain pulsatility and circulation of hepatic factor into the pulmonary arterial system to prevent pulmonary ateriovenous fistula formation. However, a subset of patients with increased pulmonary blood flow and raised pulmonary artery pressures in the preoperative period require the interruption of the antegrade pulmonary blood flow to prevent the development of superior vena cava (SVC) syndrome. The interruption of the pulmonary blood flow through the main pulmonary artery (MPA) may be accomplished either by MPA ligation or division.We report a postoperative case of superior cavopulmonary connection with complete interruption of the antegrade pulmonary blood flow by ligation who subsequently had developed a massive aneurysm of the right ventricular outflow tract (RVOT). The extreme rarity of this complication, the use of angiocardiography and contrast echocardiography for diagnosis, and a brief review of the medical literature forms the basis of this communication....

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4971996/
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