Thesis: Research the pathologic characteristics and surgical results of acute type A aortic dissection in Vietduc hospital Code: 62720124; Speciality: Thoracic Surgery Name of PhD student: Vu Ngoc Tu Name of Supervisor: PhD. Associate Professor Nguyen Huu Uoc Educational Institution: Hanoi Medical University New conclusions of the thesis: - Severe complications in acute type A aortic dissection: 69, 2% hemopericardium, 3, 7% cardiac tamponade need the pericardiocentesis before surgery.