Impact of Arterial Reocclusion and Distal Fragmentation during Thrombolysis among Patients with Acute Ischemic Stroke

RESULTS: Arterial reocclusion occurred in 18% of these patients, whereas distal embolization occurred in 16% of the 91 patients treated in these protocols. Arterial reocclusion, but not distal embolization, was associated with a lower likelihood of favorable outcome at 1–3 months (P .05; odds ratio, 3.9; 95% confidence interval, 0.01–0.98) after adjusting for age, initial National Institutes of Health Stroke Scale scores, sex, time to treatment, initial angiographic grade, symptomatic intracranial hemorrhage, and final recanalization. CONCLUSIONS: Arterial reocclusion and distal embolization occur in 16%–18% of patients with stroke undergoing endovascular intervention. Only arterial reocclusion is associated with poor long-term outcome. Prospective studies are needed to identify risk factors for their occurrence and possible preventive therapies.