IMPACT- 24col Collateral Blood Flow Assessment Following SPG Stimulation in Acute Ischemic Stroke (ImpACT-24B Sub-Study)

The purpose of the ImpACT-24col sub-study is to explore effect of SPG stimulation on the augmentation of collateral blood flow and to relate it to the subject's cerebral blood flow status, the extent of the collateral vessel potency prior to the stimulation and the relation of the vessel occlusion site to the vasodilatory effect by using digital subtraction angiography (DSA), the gold standard imaging technique to demonstrate collateral blood flow dynamics. The results of this study will further promote the knowledge towards optimization of SPG stimulation to treat acute ischemic stroke patients.