BACKGROUND AND PURPOSE: Procedural complications occur in 4%-29% of endovascular treatments in acute ischemic stroke. However, little is known about their predictors and clinical impact in the real world. We aimed to investigate the frequency and clinical impact of procedural complications of endovascular treatment and identify associated risk factors.
MATERIALS AND METHODS:From 2015-2019, we retrospectively reviewed all patients with acute ischemic stroke receiving endovascular treatment within 24 hours included in the Acute STroke Registry and Analysis of Lausanne. We identified patients having an endovascular treatment procedural complication (local access complication, arterial perforation, dissection or vasospasm, and embolization in a previously nonischemic territory) and performed logistic regression analyses to identify associated predictors. We also correlated procedural complications with long-term clinical outcome.
RESULTS:Of the 684 consecutive patients receiving endovascular treatment, 113 (16.5%) had at least 1 procedural complication. The most powerful predictors were groin puncture off-hours (OR ¼ 2.24), treatment of 2 arterial sites (OR ¼ 2.71), and active smoking (OR ¼ 1.93). Patients with a complication had a significantly less favorable short-term clinical outcome (D-NIHSS score of À2.2 versus À4.33, P-value adjusted , .001), but a similar long-term clinical outcome (mRS at 3 months ¼ 3 versus 2, P-value adjusted ¼ .272).CONCLUSIONS: Procedural complications are quite common in endovascular treatment and lead to a less favorable short-term but similar long-term outcome. Their association with treatment off-hours and at 2 arterial sites requires particular attention in these situations to optimize the overall benefit of endovascular treatment.ABBREVIATIONS: AIS ¼ acute ischemic stroke; EVT ¼ endovascular treatment E ndovascular treatment (EVT) with stent retrievers or the direct aspiration first-pass technique is considered the criterion standard procedure for eligible patients with acute ischemic stroke (AIS) with proximal intracranial large-vessel occlusion. 1-3 Even though complication rates of 4%-29% have been reported, 4-10 they do not eliminate its global beneficial effect.Procedural complications during EVT include local-access complications (ie, hemorrhage or arterial lesion at the access site) and cerebrovascular complications (ie, arterial dissection, embolization in a previously nonischemic territory, arterial perforation, or vasospasm). The occurrence of procedural complications carries the risk of additional diagnostic and therapeutic procedures, longer hospital stays, and increased illness, mortality, and costs.Awareness of the frequency and clinical impact of EVT procedural complications and of the independently associated risk factors could guide stroke teams in patient selection and complication's prevention during the procedure. In addition, the presence of such risk factors should intensify intraprocedural monitoring, which may permit a more proactive management of complicati...