Patients
Three hundred twenty-five patients with ATAAD at Union Hospital from February 2012 through February 2017 were studied. All patients were diagnosed by surgery or imaging examinations, such as computed tomography angiography (CTA), magnetic resonance imaging (MRI) or echocardiography. Patients with chronic type A aortic dissection (n=4) who were treated with intracavitary interventional therapy (n=6) or who died after conservative treatment (n=2) were excluded. Finally, a total of 313 patients (of whom 264 were male and 49 female; mean age, 48 years; range 22 to 70 years) were analyzed.