b'ARTERIAL SWITCH OPERATIONS (ASO)/ ASO WITH VSD(VOLUME BY YEAR)2018 152017 142016 6ASO Operative Mortality 1 ASO with VSD Operative Mortality 10% 0%STS National Benchmark 1 STS National Benchmark 11.9% 3.8%ASO Postoperative Median Length of Stay 1 ASO with VSD Postoperative Median Length of Stay 111 days 11 days1STS Congenital Heart Surgery National Report Published December 2018, reporting timeframe July 2014June 2018. Table 18. National Benchmark among sites with N>= 10, aggregate rate15|The Heart Center Annual Report 2018 childrens.com/heart|15'