[Therapy of acute ischemic stroke].

New diagnostic and therapeutic developments have led to an innovative approach to stroke therapy. The slogan "time is brain" emphasizes that stroke is a medical emergency comparable to myocardial infarction. The stroke unit conception is an evidence based therapy for all stroke patients and improves outcome significantly. The monitoring of vital signs and the management of stroke specific complications are highly effective. Early secondary prophylaxis reduces the risk of recurrence. The effect of CT based thrombolysis within the time window of 4,5 h has been substantiated by current data. Stroke MRI holds the promise for an improved therapy by patient stratification and by opening the time window. Interventional recanalisation, vascular interventions and hemicraniectomy complement the therapeutic options in the acute phase of stroke.