Re-assessing the importance of good collateral in thrombectomy

Takeaway

  • 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.