Fig. 1

Outcomes of EVF during MT. A Patient 1 presents with EVF on DSA during MT (indicated by red arrows), and follow-up CT images suggest malignant brain edema; B Patient 2 presents with EVF on DSA during MT (indicated by red arrows), and follow-up CT images suggest hemorrhagic transformation. CT, computed tomography; DSA, digital subtraction angiography; EVF, early venous filling; MT, mechanical thrombectomy