Hepatic venous outflow obstruction (HVOO) is a rare complication after liver transplantation (LT) associated with significant morbidity and reduced graft survival. Endovascular intervention has become the first-line treatment for HVOO, but data on long-term outcomes are lacking. We have analysed outcomes after endovascular intervention for HVOO in 905 consecutive patients who received 965 full-size LT at our unit from January 2007 to June 2014. There were 27 (3%) patients who underwent hepatic venogram for suspected HVOO, with persistent ascites being the most common symptom triggering the investigation (n = 19, 70%). Of those, only 10 patients demonstrated either stricture or pressure gradient over 10 mmHg on venogram, which represents a 1% incidence of HVOO. The endovascular interventions were balloon dilatation (n = 3), hepatic vein stenting (n = 4) and stenting with dilatation (n = 3). Two patients required restenting due to stent migration. The symptoms of HVOO completely resolved in all but one patient, with a median follow-up period of 74 (interquartile range 39-89) months. There were no procedure-related complications or mortality. In conclusion, the incidence of HVOO in patients receiving full-size LT is currently very low. Endovascular intervention is an effective and safe procedure providing symptom relief with long-lasting primary patency.
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