Table 2 Indications for alternative management of the left subclavian artery in both groups

Covered group

 Dominant right vertebral artery (including 5 emergency procedures)

38 (34.9)

 Bilateral vertebral artery equipotential (including 4 emergency procedures)

11 (10.1)

 Preoperative thrombosis of the left subclavian artery

3 (2.7)

Revascularized group

 Dominant left vertebral artery (including 2 emergency procedures)

41 (37.6)

 Occluded right vertebral artery

3 (2.7)

 Planned long-segment coverage of the descending thoracic aorta

5 (4.7)

 A functioning arteriovenous shunt in the left arm

3 (2.7)

 Patent left internal mammary artery to coronary artery bypass graft

2 (1.9)

 Bilateral internal carotid artery stenosis

3 (2.7)