To discuss the meaning and technical key points of the chimney technique in left subclavian artery during the procedures of endovascular aortic repair (EVAR) for the Stanford type B aortic dissection.

A total of 35 patients with type B aortic dissection diagnosed by clinical and imaging assessments, whose left subclavian artery was involved by dissection, were retrospectively analyzed. All the cases were assessed by CTA before EVAR, their left subclavian arteries were covered by the deployments of stent grafts. The occlusive arteries were recanalized by balloon expanding stents.

The placements of aortic stent grafts and subclavian arterial stents were successful in all the 35 cases. All the left subclavian arteries were opened during 3—24 months follow-up. The recanalized rate was 100%.

In the procedures of EVAR the proximal anchoring zone of stent grafts should be chosen in the normal vascular wall to prevent from available dissection caused by therapies. After the deployments of stent grafts which covered left subclavian arteries, the recanalization with chimney technique can prevent from the occurrence of "blood stealing symptoms" effectively. It is simple and safe.