[Intravenous Thrombolysis for Acute Ischemic Stroke: Current Evidence and Perspectives]

Since its introduction, intravenous thrombolysis (IVT) with alteplase has remained a mainstay of reperfusion therapy in the hyperacute management of acute ischemic stroke (AIS). Recent clinical evidence has driven a major paradigm shift from a strictly "time-based" approach to a "tissue-based" approach. Advanced neuroimaging techniques, including diffusion-weighted imaging-fluid-attenuated inversion recovery (DWI-FLAIR mismatch) and perfusion mismatch analyses, have enabled extension of the treatment window beyond 4.5 h and treatment of patients with strokes of unknown onset, particularly benefiting those who are ineligible for endovascular thrombectomy (EVT). Furthermore, the treatment criteria have been refined to recommend IVT for disabling deficits regardless of the baseline stroke severity score while withholding it from patients with minor, nondisabling presentations. An emerging challenge in clinical practice is determining whether IVT should be contraindicated in patients receiving novel amyloid-targeting therapies for Alzheimer's disease. Meanwhile, prehospital protocols involving mobile stroke units (MSUs) may help reduce onset-to-needle time in selected regions. IVT continues to evolve through personalized patient selection aimed at maximizing safety and improving functional outcomes.