The effect of anesthesia on hemodynamics and outcome of patients undergoing thrombectomy after acute ischemic stroke: a retrospective analysis.

BACKGROUND: Anesthesia during thrombectomy remains a matter of debate. We retrospectively investigated the influence of intraprocedural blood pressure and type of anaesthetic agent on 3-month functional outcome and mortality in stroke patients undergoing mechanical thrombectomy under general anesthesia in a single center study. METHODS: All patients suffering from stroke who presented between January 2019 and July 2021 at Ziekenhuis Oost-Limburg Genk, Belgium and who received thrombectomy were included. Patient's characteristics and outcome data had been collected for benchmarking. Detailed perioperative data were exported from the electronic anesthesia records and clinically validated. Patients were stratified by peri-operative presence of hypotension (MAP < 65 mmHg at any time point) versus no-hypotension (MAP ≥ 65 mmHg). RESULTS: All 98 patients received mechanical thrombectomy under general anesthesia. Thirty-six percent (n = 35) was hypotensive peri-operatively at any time point. Proportion of sevoflurane use was higher in non-hypotensive patients compared to hypotensive patients (73% (n = 45) vs. 51% (n = 18), p = 0.04). Peri-operative use of vasopressors was higher in the hypotensive group compared to non-hypotensive (88% (n = 30) vs. 63% (n = 39), p = 0.008). Proportion of patients with good functional outcome at 3 months (mRS 0-2) was higher in non-hypotensive patients compared to hypotensive patients 44% (n = 27) vs. 24% (n = 8), p < 0.05. 90-day mortality was lower in non-hypotensive patients compared to hypotensive patients 21% (n = 13) vs. 43% (n = 15), (p = 0.02). CONCLUSION: Patients who are hypotensive at any given time during thrombectomy under general anesthesia may have worse neurological outcome compared to non-hypotensive patients. The best anaesthetic management for mechanical thrombectomy needs to be clarified prospectively in large multicenter studies.