TORONTO – Several U.S. and Canadian patients have recently undergone successful mitral valve surgery featuring a platform designed by Toronto-based Baylis Medical Inc. to provide more precise access to the wall separating the left and right sides of the heart. Robert Harrison, Baylis's director of research and development for cardiology, said in addition to locating the precise puncture point for mitral valve reconstruction, the Versacross transseptal solution has reduced the number of devices exchanged during the procedure to an all-in-one platform.