 Indeed, the initial difficulties that prevented an earlier adoption of this approach were mostly the inability to transfer the coronary arteries, besides problems with early forms of cardiopulmonary bypass that made cardiac surgery in early infancy less safe than in the present times 

The acute mortality associated with the Senning procedure is reported to be around 5-10%.Patient selection and complexity of the congenital malformation are determinants of mortality risk.Patients who have undergone such surgical correction of the congenital transposition are exposed to long term risks of cardiovascular events.