here is the reference "Evolution of surgical therapy for Stanford acute type a aortic dissection Annals of cardiothoracic surgery 2016;5(4):275-295". This is almost a statement of standard of practice
Du you have any explanation of why the patient experienced dissection? (ex. hypertension) Do any other family members experience aortic disease in the ascending aorta? The patient is rather old but could it be a genetic cause?