Summary of periprocedural events
| Age/Sex | Presenting Symptom | Initial NIHSS | Type of Lesion | Adverse Event | Time Interval after Procedure | Imaging Finding | Possible Cause of Event | F/U Period (months) | Final Status (mRS) |
|---|---|---|---|---|---|---|---|---|---|
| 60/M | Progressively deteriorating | 13 | Ipsilateral remote tandems (BA + vertebral ostium) | Death | 4 hours | ICH + SAH on CT | Hyperperfusion, bleeding tendency or basilar arterial injury | – | 6 |
| 45/M | TIA | 0 | Ipsilateral adjacent tandems (M1 segment) | Minor stroke | 1 day | Ischemia of basal ganglia on MR Imaging | Partial stent thrombosis | 17 | 0 |
| 67/M | TIA | 1 | Bilateral ICA bulb lesions | Minor stroke | 11 days | Small ICH on CT | Delayed hyperperfusion | 15 | 0 |
| 69/M | Fluctuating after repeated strokes | 10 | Ipsilateral adjacent tandems (Intradural VA + VBJ) | Major stroke | 1 day | Pontine ischemic change | Perforator ischemia | 13 | 5 |
| 68/M | TIA | 2 | Ipsilateral remote tandems (cavernous ICA + carotid bulb) | Minor stroke | 2 days | Cortical HSI | Thromboembolic events | 6 | 0 |
Note:—ICA indicates internal carotid artery; SAH, subarachnoid hemorrhage; ICH, intracerebral hemorrhage; TIA, transient ischemic attack; HSI, high signal intensity; BP, blood pressure; mRS, modified Rankin Scale; VBJ, vertebrobasilar junction; VA, vertebral artery; BA, basilar artery.