Table 1 Patient characteristics

Age, years (mean ± SD)

67.2 ± 7.5

71.7 ± 6.5

0.100

Men/Women, n

4/7

6/9

0.851

Cardiovascular comorbidity, n

–

 Valvular heart disease

8

13

 Ischemic heart disease

1

0

 Thoracic aortic aneurysm

1

0

 Aortic dissection

0

1

 Aortic dissection + Ischemic heart disease

1

0

 Valvular heart disease + Ischemic heart disease

0

1

Warfarin indication (preoperative), n

–

 Atrial fibrillation

4

11

 Post prosthetic valve replacement

4

4

 Low LVEF

3

0

Dosage of warfarin (baseline), mg/day (mean ± SD)

2.64 ± 0.89

3.07 ± 1.22

0.370

PT-INR value (baseline) (mean ± SD)

2.13 ± 0.58

2.27 ± 0.58

0.551