Background:
After clinical practice guidelines extended the mechanical endovascular reperfusion [MER] window, our Comprehensive Stroke Program expanded its stroke alert [SA] to include last known well [LKW] 6-24 hours [h]. Expansion included implementation of a standardized large vessel screen, RAPID brain imaging software, revised algorithm, EMS and community education, and regional transfer guidelines.
Purpose:
Evaluate outcomes of the extended window [EW] for ischemic stroke treatment.
Method:
We reviewed ischemic strokes over a 2 year period and categorized them into two groups: 2017 pre-guideline [PG] and 2018 EW post-guideline [PostG]. Each group was divided into all-MERs and MERs 6-24h. Groups were compared by LKW, NIHSS, TICI scores, complications, discharge [DC] disposition and Modified Rankin Score [mRS] at DC and 90 days [90d]. Outcomes were evaluated to identify the EW impact.
Results:
Of 744 strokes reviewed, 365 were PG and 379 were EW PostG. LKW 6-24h was greater PostG [22%=PG versus [v] 30%=EW], in all-MERs [19%=PG v 31%=EW] and MERs 6-24h [69%=PG v 83%=EW]. Stroke severity [NIHSS>7] was higher PostG [41%=PG v 45%=EW], in all-MERs [88%=PG v 91%=EW] and MERs 6-24h [85%=PG v 96%=EW]. MER treatment rates increased PostG [13%=PG v 17%=EW]. Post-MER TICI 2b/3 reperfusion rates were higher PostG in all-MERs [63%=PG v 77%=EW] and MERs 6-24h [38%=PG v 71%=EW]. Any complication was lower PostG [27%=PG v 22%=EW] with higher complication rates in MERs 6-24h [15%=PG v 17%=EW]. More patients were DC home PostG [42%=PG v 46%=EW], in all-MERs [25%=PG v 30%=EW], and MERs 6-24h [8%=PG v 29%=EW]. mRS 0-2 at DC was increased PostG [20%=PG v 29%=EW], in all-MERs [12%=PG v 27%=EW], and MERs 6-24h [8%=PG v 34%=EW]. mRS at 90d was increased PostG for all-MERs [25%=PG v 34%=EW] with decreased deaths [15%=PG v 10%=EW].
Conclusion:
The EW has increased patients treated and improved overall outcomes. Patients arriving with LKW 6-24h has increased along with stroke severity. Reperfusion rates improved and overall complications were lower, however higher rates were seen in MERs 6-24h. Patients treated in the EW had reductions in post stroke disability, increases in DC to home, and improvements in mRS at DC and 90d.