Arterial Obstruction on Computed Tomographic or Magnetic Resonance Angiography and Response to Intravenous Thrombolytics in Ischemic Stroke.

There was a nonsignificant trend toward better outcomes after alteplase versus control among patients with obstructed (OR, 1.86; 95% CI, 0.76–4.53; P =0.171) versus patent (OR, 0.72; 95% CI, 0.42–1.25; P =0.241) arteries on the IST-3 angiography score, P =0.075 for interaction (Figures 1 and 2 ).

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