Time to Wake-Up: Extending the Window for Management of Unknown-Onset Strokes

Abstract

The term “Wake-Up Stroke” is applied to a patient who displays no symptoms before sleep, but wakes with neurologic deficits suggestive of stroke. The current guidelines for acute ischemic stroke limit intravenous tissue plasminogen activator use to stroke patients in whom symptom onset or last known well is less than 4.5 hours. Approximately one-third of acute ischemic stroke patients present with unknown time of symptom onset and are often not eligible for intravenous reperfusion therapy in clinical practice. This review provides an overview of several earlier trials that used advanced neuroimaging to determine eligibility for reperfusion therapy in patients with unknown stroke onset. The reassuring results of these earlier trials that led to recent thrombolysis trials specifically targeted at “wake-up stroke” patients are discussed in this review. Ongoing studies aim to expand our knowledge regarding the safety and efficacy of thrombolysis in these patients.

Multicentre registration of wake-up stroke in China (MCRWUSC): a protocol for a prospective, multicentre, registry-based cohort study

“…This has caused patients to be frequently excluded from the recanalisation therapy, resulting in increased functional impairment and a poor prognosis 5 6. The best treatment is usually not suitable for patients who had a WUS because thrombolysis is usually provided to patients who had an AIS within the first definite 4.5 hours of symptom onset 7–9. Therefore, studying the stroke onset time range as well as clinical and imaging features will be helpful to explore whether the active treatment in the acute phase is beneficial and provide an essential reference and basis for the diagnosis and treatment of WUS.…”