Surgical treatment of complex congenital heart disease with modified Fontan procedure.

Between October 1973 and mid-January 1987, 500 patients underwent a modified Fontan operation at the Mayo Clinic. This included 163 patients with tricuspid atresia, 154 patients with double inlet ventricle, and 183 patients with other complex single ventricle malformations. There have been 80 hospital deaths (16%). In the last 5 years there have been 39 deaths (11.7%). Lowest mortality was seen in patients with tricuspid atresia (11% overall,...