Good pre-surgical venous outflow, irrespective of collateral status, was associated with greater chance of successful vessel reperfusion following thrombectomy in people with acute ischemic stroke due to large vessel occlusion (AIS-LVO).
Why this matters
A good arterial collateral supply per computed tomography angiography (CTA) is associated with successful vessel reperfusion following thrombectomy in people with AIS-LVO; however, collateral supply measured using CTA only reflects reperfusion of cerebral vessels, and not cerebral tissue.
Good venous outflow from brain tissue on CTA is an excellent indicator of tissue perfusion. However, whether good venous outflow prior to thrombectomy is associated with good reperfusion outcomes post-thrombectomy is unknown.