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  • Title: Biventricular Repair in Interrupted Aortic Arch and Ventricular Septal Defect With a Small Left Ventricular Outflow Tract.
    Author: Mallios DN, Gray WH, Cheng AL, Wells WJ, Starnes VA, Kumar SR.
    Journal: Ann Thorac Surg; 2021 Feb; 111(2):637-644. PubMed ID: 32599045.
    Abstract:
    BACKGROUND: In patients with interrupted aortic arch and ventricular septal defect (VSD) with a small left ventricular outflow tract (LVOT), either aortopulmonary amalgamation or a Ross-Konno type procedure can be performed to create stable systemic outflow. We sought to analyze factors associated with these different surgical approaches. METHODS: We retrospectively identified patients who underwent surgical repair for interrupted aortic arch/VSD at our institution between 1998 and 2017. Of these, 43 patients had a small, native LVOT that was unsuitable for systemic outflow. Patient data were retrospectively collected for this cohort and analyzed. RESULTS: Aortopulmonary amalgamation was performed at 7 days (interquartile range [IQR], 5-10) in 30 patients (group I). Within group I a primary Yasui repair with ventricular septation was performed in 3 patients and a Norwood-type repair in the other 27. Of these 27, 19 underwent subsequent biventricular conversion at 9 months (IQR, 7-11). In contrast 13 patients underwent a Ross procedure at 12 days (IQR, 6-27) (group II). Compared with group I, group II patients had a smaller VSD (3.5 vs 5.1 mm, P < .001) that was more often remote from the semilunar valves (38% vs 13%, P = .02). Operative mortality occurred in 1 group I patient (4%) at the time of biventricular conversion and 2 group II patients (15%) during the Ross procedure. After a 5.2-year (IQR, 3.2-7.4) follow-up there were 2 additional mortalities in each group, all unrelated to cardiac disease. CONCLUSIONS: When native LVOT in interrupted aortic arch/VSD is unsuitable for systemic outflow, size and location of the VSD can be used to tailor the surgical approach to establish biventricular circulation with favorable intermediate-term outcomes.
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