Occipital to posterior inferior cerebellar artery bypass surgery

Abstract

The results, complications and technical aspects of occipital to posterior inferior cerebellar artery (PICA) bypass surgery are reviewed. Patients were divided into 2 groups: those considered to be a high risk for posterior circulation infact but not disabled by the symptoms or deficits (8 patients), and those moderately or severely disabled at the time of admission (8 patients). Postoperative angiography revealed that 15 of the 16 grafts were patent. In 10 of the 15 patent grafts, the bypass graft served as a sole or major blood supply of the vertebral basilar system; in 5 patients, flow was limited to the distribution of the PICA. Eight patients achieved full employment or normal activity, 6 were improved but did not return to full employment, and 2 patients were unchanged. Ataxia was the major residual deficit in these patients.