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Extra-intracranial bypass surgery for vertebrobasilar insufficiency due to obstructive vertebral artery and
Insights
Direct extra-intracranial arterial bypass surgery effectively treated vertebrobasilar insufficiency in 19 patients. This posterior circulation bypass surgery prevented further ischemic events, showcasing its protective effect.
Area of Science:
- Neurosurgery
- Vascular Surgery
- Neurology
Background:
- Vertebrobasilar insufficiency (VBI) poses significant risks due to posterior circulation compromise.
- Hemodynamically significant lesions in vertebral arteries (VA) or the vertebral-basilar artery junction (VABAJ) necessitate advanced treatment strategies.
Purpose of the Study:
- To evaluate the efficacy of direct extra-intracranial arterial bypass surgery to the posterior circulation in patients with VBI.
- To present a modified surgical technique utilizing a paramedian approach.
Main Methods:
- The study included 19 patients with VBI confirmed by preoperative angiography.
- Extra-intracranial bypass surgery was performed using the occipital artery (OA) connected to the posterior inferior cerebellar artery (PICA), VA, or anterior inferior cerebellar artery (AICA).
- A paramedian approach was employed for the surgical procedure.
Main Results:
- All 19 patients underwent successful bypass surgery.
- Postoperative clinical outcomes supported the protective effect of the bypass graft.
- The surgical intervention aimed to prevent further ischemic events in the posterior circulation.
Conclusions:
- Direct extra-intracranial arterial bypass to the posterior circulation is a viable treatment for VBI.
- A patent bypass graft in the posterior circulation confers a protective effect against ischemic events.
- The modified paramedian approach is a feasible surgical option for this procedure.
Abstract:
This report is on 19 patients with vertebrobasilar insufficiency in whom direct extra-intracranial arterial bypass surgery to the posterior circulation was performed. In all patients preoperative angiography had demonstrated vascular lesions of haemodynamic significance of either one or both vertebral arteries (VA) or within the vertebral-basilar artery junction (VABAJ). The bypass procedure was performed between the occipital artery (OA) and - depending on the localization of the obstructive vascular lesion - the posterior inferior cerebellar artery (PICA), the VA or the anterior inferior cerebellar artery (AICA). A modification of the operative technique is presented with using a paramedian approach. The clinical results of this series support the concept that a patent extra-intracranial graft to the posterior circulation may have a protective effect by preventing further ischaemic events.