ABSTRACT
The reperfusion therapies for acute ischemic stroke (AIS) patients in the past have set strict limits on time window. However, with the imaging assessment algorithms for "tissue window" becoming more mature, the time window for reperfusion therapies has been continuously extended. Nowadays the time window of intravenous thrombolysis has been extended to 9 hours after onset of stroke and is expected to be further broadened to 24 hours. At the same time, clinical studies of mechanical thrombectomy for posterior circulation large vessel occlusion (LVO), LVO with large ischemic cores and distal and medium vessel occlusion are all in hot progress. This article summarized diverse imaging assessment algorithms for "tissue window" and the latest advances of clinical research related to different fibrinolytic drugs for intravenous thrombolysis, mechanical thrombectomy for various vascular occlusion and bridging therapy of AIS in the extended time window. The objective of this review was to provide some references for the clinical diagnosis and therapy of stroke beyond time window.