Clinical Report: Evaluating the Safety and Effectiveness of Intravenous tPA
Overview
This study assesses the safety and efficacy of adjunctive intravenous tPA after successful thrombectomy in acute ischemic stroke patients with large vessel occlusion. Results indicate improved microvascular reperfusion and functional outcomes without increased hemorrhagic complications.
Background
Endovascular thrombectomy (EVT) is the standard treatment for acute ischemic stroke due to large vessel occlusion (LVO), yet many patients experience suboptimal recovery despite successful reperfusion. Adjunctive therapies targeting microvascular deficits are being explored to enhance outcomes. This study investigates the potential benefits of low-dose intravenous tPA administered post-thrombectomy.
Data Highlights
Outcome
Post-IV tPA Group
Standard Care Group
p-value
Post-EVT PBV Ratios
1.45
1.20
0.03
ΔPBV
2.45
1.81
0.011
Good Functional Outcomes (mRS 0-2 at 90 days)
61.9%
29.4%
0.025
Overall ICH
14.3%
14.7%
1.00
sICH
9.5%
8.8%
1.00
90-day Mortality
0%
9%
0.54
Key Findings
The post-IV tPA group had significantly higher post-EVT PBV ratios compared to standard care (1.45 vs. 1.20, p = 0.03).
Good functional outcomes (mRS 0-2 at 90 days) were more frequent in the post-IV tPA group (61.9% vs. 29.4%, p = 0.025).
No significant differences in overall ICH (14.3% vs. 14.7%, p = 1.00) or sICH (9.5% vs. 8.8%, p = 1.00) were observed.
Patients with lesion growth on diffusion-weighted imaging had lower post-EVT PBV and ΔPBV ratios (p = 0.002 and 0.0134, respectively).
Longer onset-to-recanalization time was associated with hemorrhagic events in the post-IV tPA group (307 min vs. 226 min, p = 0.04).
Clinical Implications
The findings suggest that adjunctive IV tPA may enhance microvascular reperfusion and improve functional outcomes in patients post-thrombectomy without increasing the risk of hemorrhagic complications. Careful patient selection is necessary for optimal outcomes.
Conclusion
Adjunctive IV tPA administration following successful EVT may provide benefits in microvascular reperfusion and functional recovery, warranting further investigation in prospective randomized trials.
