Endovascular treatment for acute ischemic stroke patients beyond six hours from onset is still effective, according to a collaborative study conducted by the LKS Faculty of Medicine at the University of Hong Kong (HKUMed) and Queen Mary Hospital (QMH). The study, conducted over five years, found that over 30% of patients who received endovascular treatment had a good clinical outcome even after six hours of the onset of symptoms. Ischemic stroke, a leading cause of death and disability in Hong Kong and worldwide, requires rapid and timely treatment to minimize patient harm.