Examines the aortic root replacement with direct re-implantation of the coronary arteries as the standard operation for an aortic dissection. Development of Cabrol technique to overcome the use of Dacron interposition graft to connect both coronary orifices to the aortic graft; Use of Cabrol technique in redo aortic root surgery; Incidence of aortic dissection after aortic root surgery.