Age, years

71.8

± 9.6

Male, n (%)

41

 (70.7)

Etiology 

Aortic dissection/ disected aneurysm

26

 (44.8)

True aneurysm

31

 (53.4)

Prosthetic vascular graft infection

1

 (1.7)

Comorbidity

Hypertension, n (%)

42

 (72.4)

Dyslipidemia, n (%)

25

 (43.1)

Diabetes, n (%)

9

 (15.5)

History of neurological diseas, n (%)

10

 (17.2)

History of heart disease, n (%)

7

 (12.6)

Chronic kidney disease, n (%)

6

 (10.3)

Maintenance dialysis, n (%)

1

 (1.7)

Cerebrovascular disease, n (%)

0

 (0)

Asthma, n (%)

3

 (5.2)

COPD, n (%)

2

 (3.4)

Steroid administration, n (%)

1

 (1.7)

Known dementia, n (%)

1

 (1.7)

Preoperative status

Cardiopulmonary resuscitation, n (%)

0

 (0)

Cardiogenic shock, n (%)

1

 (1.7)

Acute coronary syndrome, n (%)

1

 (1.7)

Cerebral infarcion

0

 (0)

Consciousness disorder, n (%)

1

 (1.7)

Transient ischemic attack, n (%)

1

 (1.7)

Shaggy aorta, n (%)

1

（1.7）

Preoperative MRI (n=47)

Chronic ischemic white matter changes, n (%)

11

(23.4)