Ross Operation With Autologous External Autograft Stabilization-Long-term Results

BACKGROUND We have proposed an external stabilization technique to minimize autograft dilatation after the Ross operation. This study analyzed autograft function and root dimensions after root replacement with and without external root support. METHODS Between October 1995 and February 2021, 185 adult patients (73% male; age, 38 +/- 9 years) underwent a Ross operation as full-root replacement, 136 with support and 49 without support. Autograft function and root di-mensions were determined echocardiographically. Median follow-up was 3.4 years (interquartile range, 1.13-14.74 years) and was 95% complete. Survival and freedom from reoperation were calculated. Changes in autograft root di-mensions were analyzed using mixed-effect models. RESULTS Survival (95%) and freedom from autograft reoperation (94%) at 15 years were higher with than without support (P = .003 or P = .004). In the first 5 years, patients with support showed an indexed root size progression of 0.712 mm/(y center dot m) (P = .003) compared with 1.554 mm/(y center dot m) (P = .001) without. Progression rates were higher for patients without stabilization (P = .045). After 5 years, progression rates were similar in both groups at 0.248 mm/(year center dot m) (P < .001) but with persistent a difference between the groups. CONCLUSIONS The Ross procedure as full-root replacement is associated with a relevant rate of autograft dilatation and reoperation. The use of external root stabilization may reduce autograft dilatation and is associated with improved survival and durability. (Ann Thorac Surg 2022;114:502-10) (c) 2022 by The Society of Thoracic Surgeons