 Treatments All the patients were admitted to ICU or general wards at the discretion of doctors. Based on the guidelines of aortic management, all patients received analgesic therapy and standard control of heart rate and blood pressure treatments. Intravenous esmolol was used for continuous control of heart rates. Choice of intravenous antihypertensive agents was at the discretion of the in charge physicians. After the stabilization of the situation, the intravenous medications were shifted to the oral treatments. The target blood pressure for the intensive and conventional groups were 140mmHg and 120mmHg respectively. For most patients, they will undergo an endovascular treatment approximate two weeks later. 