PREVALENCE, ASSOCIATED FACTORS AND REINTERVENTION RATE OF ENDOLEAKS AFTER THORACIC ENDOVASCULAR AORTIC REPAIR AMONG PATIENTS WITH THORACIC AORTIC ANEURYSMS, PHRAMONGKUTKLAO HOSPITAL, BANGKOK, THAILAND

Abstract

Background: Endoleaks are one of the complications seen after endovascular repair of thoracic aortic aneurysms (TAA). The study evaluated the prevalence, associated factors and reintervention rate, the classified type of endoleaks and the outcomes of secondary interventions among patients with endoleaks. Methods: Between 2010 and 2020, medical and radiologic data of all patients receiving a diagnosis of TAA treated by thoracic endovascular aortic repair (TEVAR) and undergoing postoperative CT angiogram at Phramongkutklao Hospital were retrospectively reviewed and analyzed. Results: Over a median follow-up of 569 days (IQR=93-1256), 6 of 26 (23.08%) patients developed endoleaks, of which 50% (3 of 6) were type I, 16% (1 of 6) were type II, IV and V each and none were type III. The median aneurysm diameter was 62 mm (IQR=52.5-75.5). Endoleaks were associated with younger age (p<0.05) and a higher percentage of graft oversizing over the aorta distal to the aneurysm (p=0.014). All patients with endoleaks underwent reintervention (100%) with good outcomes. Conclusion: Endoleaks were detected in one of the four patients treated with TEVAR during follow-up, particularly when they were young or exhibited a too oversized graft over the aorta distal to the aneurysm. All patients with endoleaks underwent reintervention with good outcomes.