Late Pulmonary Autograft Dilation: Can We Make a Good Operation Great? The Supported Ross

Abstract

BackgroundThe Ross procedure is an excellent option for aortic valve replacement resulting in outstanding hemodynamic performance and the ability to avoid systemic anticoagulation. The long-term durability of the autograft is generally good but concerns for later aortic root dilation with ensuing neoaortic insufficiency have prompted efforts to stabilize the autograft, root, sinuses and Sino-tubular junction in order to delay or entirely avoid late reinterventions on the neoaortic root. We have employed an inclusion technique, supporting the Auto-graft in a Terumo GelweaveTM Valsalva graft. MethodsWe performed a retrospective study of all 129 patients undergoing the Ross procedure from 1992-2019 at Children's Wisconsin. 51 underwent the supported Ross (SR) and 78 underwent unsupported Ross (UR). Structured clinical data was collected and echocardiograms were reviewed. ResultsMedian follow-up was 4.9 years (up to 22.6 years) for UR patients and 3.6 years (up to 11.4 years) for SR patients. In order to provide a fair comparison, we sub -analyzed patients aged 10-18 years who underwent the Ross procedure, 16 who underwent the UR and 18 patients who underwent the SR. Change in aortic annulus diameter (p=0.002), aortic sinus diameter (p=0.001) change in left ventricular function (p=0.039) and change in aortic insufficiency (p=0.008) were all worse in UR. ConclusionsThe SR is simple, reproducible, and predictable. It seems to prevent change in annulus diameter, sinus diameter and to reduce late neoaortic insufficiency. Longer follow-up with a larger group of patients is required to draw definitive conclusions.