Telephone contact was maintained with the patients after discharge. At 3,6,12 months postoperatively , patients received a follow-up examination, chest radiography, echocardiography, bilateral carotid artery Doppler examinations and CT angiography (CTA) examinations Numerical data were expressed as percentages. Quantitative data were expressed as mean ± standard deviation. The primary end point is the occluded rate of the false lumen one year postoperatively. The secondary end point are the survive rate ,complication, reoperation rate, the growth rate of thoracic descending aorta, security index perioperatively, life quality postoperatively.Statistical analysis were performed with SPSS 11.5 software. A value of P < 0.05 was considered statistically significant.