Abstract WP9: Number Needed To Treat With Intravenous Tenecteplase To Reduce The Need For Mechanical Thrombectomy In Large Vessel Occlusion Acute Ischemic Stroke Patients: Real-world Experience Data.

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Objective: We sought to describe short term outcomes in patients with large vessel occlusion acute ischemic stroke (LVOAIS) who were treated with intravenous tenecteplase (TNK) as compared to alteplase, focusing on reduction in the need for mechanical thrombectomy (MT). Background: In LVOAIS, TNK has shown improved reperfusion and outcomes with a similar safety profile to alteplase. Ultra-early reperfusion has been described with TNK which would prevent the need for MT. We analyze the magnitude of this effect in a “real-world” setting. Design/Methods: In this retrospective study, demographic, clinical, and imaging information from patients with LVOAIS treated with intravenous thrombolysis was collected. Data was compared between the group treated with TNK and alteplase. Results: One hundred eighty-six patients met the criteria for the study (LVOAIS and candidates for IV thrombolysis and MT). Of these, 144 patients received tPA and 42 received TNK. Nine had clinical improvement prior to groin puncture and did not require angiography. This phenomenon occurred in 2.1% who received IV tPA and 14.3% who received TNK (p=0.005). For 8.2 patients treated with TNK rather than tPA, one catheter angiography would be prevented. When combining the number of patients who had recanalization on angiography before MT, and those who had clinical improvement prior to angiography, there were a total of 23 patients. This was noted in 9.7% of patients who received tPA, and 21.4% of those who received TNK (p=0.043). For 8.5 patients treated with TNK rather than tPA, one patient will have spontaneous recanalization either angiographically or with clinical improvement, preventing the need for MT. Conclusions: Intravenous TNK in patients with LVOAIS reduces the need for catheter angiography and mechanical thrombectomy.

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