Endovascular treatment in ischemic strokes with large infarct core: an updated systematic review and meta-analysis of randomized controlled trials.

BACKGROUND: Endovascular treatment (EVT) is recommended for acute ischemic stroke due to large-vessel occlusion (LVO) and an ASPECTs ≥ 6. Recent randomized controlled trials (RCTs) have become available on effect of EVT in patients with LVO-related large core infarct stroke (ASPECTS 0-5). We conducted a systematic review and meta-analysis of trials on patients with large core infarct treated with thrombectomy compared to best medical therapy (BMT). METHODS: The study followed PRISMA guidelines. Primary endpoint was functional independence at 90 days (modified Rankin Scale mRS < 3). Secondary endpoints were 3-month moderate disability (mRS < 4), excellent outcome (mRS < 2) and change in mRS (shift analysis). Safety outcomes were: symptomatic intracranial hemorrhage (sICH) and 3-month mortality. RESULTS: Seven RCTs were included with a total of 1964 patients. Functional independence was significantly more frequent in EVT vs BMT group (19.4% vs 8%; OR = 2.72, 95%CI = 2.06-3.61, pheterogeneity = 0.08; I2: 47%). Moderate outcome was also more prevalent in EVT group (OR = 2.00; 95%CI = 1.61 - 2.48, pheterogeneity = 0.17; I2: 46%) as well as excellent outcome (OR: 1.54, 95%CI = 1.07 - 2.22, pheterogeneity = 0.13; I2: 40%). Shift analysis was also significant with OR 1.59 (CI = 1.33-1.82 and p < 0.001). Finally sICH, that occurred in 68 patients, was more frequent in EVT (OR = 1.63, 95%CI = 0.99 - 2.69, pheterogeneity = 0.68; I2: 0%) while 3 m mortality was reduced in EVT (31% vs 37,1%, OR 0.76 CI = 0.62-0.92). CONCLUSIONS: This updated pooled data show that, in LVO-stroke patients with a large core infarct, EVT plus BMT (as compared to BMT alone) increases significantly the chances of achieving a good functional outcome at 90 days and reduces the 3- month mortality despite a marginal increase in acute sICH.

Thrombectomy in ischemic stroke patients with tandem occlusion in the posterior versus anterior circulation.

BACKGROUND: Mechanical thrombectomy (MT) was found to be beneficial in acute ischemic stroke patients with anterior tandem occlusion (a-TO). Instead, little is known about the effectiveness of MT in stroke patients with posterior tandem occlusion (p-TO). We aimed to compare MT within 24 h from last known well time in ischemic stroke patients with p-TO versus a-TO. METHODS: We conducted a cohort study on prospectively collected data of patients registered in the Italian Registry of Endovascular Treatment in Acute Stroke (IRETAS) who were treated with MT within 24 h from last known well time for acute ischemic stroke with p-TO (n = 275) or a-TO (n = 1853). RESULTS: After adjustment for unbalanced pre-procedure variables (year 2015-2021, age, sex, NIHSS score, ASPECTS, and time strata for puncture groin) and pre-stroke mRS score as pre-defined predictor, p-TO was significantly associated with lower probability of mRS score 0-2 (OR 0.415, 95% CI 0.268-0.644) and with higher risk of death (OR 2.813, 95% CI 2.080-3.805) at 3 months. After adjustment for unbalanced procedural and post-procedure variables (IVT, general anesthesia, TICI 3, and 24-h HT) and pre-stroke mRS score as pre-defined predictor, association between p-TO and lower probability of mRS score 0-2 (OR 0.444, 95% CI 0.304-0.649) and association between p-TO and with higher risk of death (OR 2.971, 95% CI 1.993-4.429) remained significant. CONCLUSIONS: MT within 24 h from last known well time in ischemic stroke patients with p-TO versus a-TO was associated with worse outcomes at 3 months.

Myelomatous meningitis diagnosed by cerebrospinal fluid cytology examination.

Myelomatous meningitis diagnosed by CSF cytology. The combined use of cytology with immunocytochemistry can identify the presence of multiple myeloma cells in cerebrospinal fluid specimens.

Drip-and-ship toward mothership model for mechanical thrombectomy during COVID-19 pandemic: a retrospective analysis.

INTRODUCTION: During the first wave of the COVID-19 pandemic in spring 2020, our stroke network shifted from a drip-and-ship strategy (transport of acute ischemic stroke patients to the nearest primary stroke centers) toward a mothership model (direct transportation to the Comprehensive Stroke Center). We retrospectively analyzed stroke network performances comparing the two models. PATIENTS AND METHODS: All spoke-district patients treated with endovascular thrombectomy (EVT) between 15th March-15th June 2019 (drip-and-ship) and 2020 (mothership) were considered. We compared onset-to-groin time (OGT) and onset-to-needle time (ONT) between the two periods. Secondarily, we investigated other performances parameters (percentage of IV thrombolysis, timing of diagnostic and treatment) and clinical outcome (3-month modified Rankin Scale). RESULTS: Twenty-four spoke-district patients in 2019 (drip-and-ship) and 26 in 2020 (mothership) underwent EVT. The groups did not differ for age, sex, risk factors, pre-stroke mRS 0-1, NIHSS, and ASPECTS distribution. The MS model showed a significant decrease of the OGT (162.5 min vs 269 min, p = 0.001) without significantly affecting the ONT (140.5 min vs 136 min, p = 0.853), ensuring a higher number of IV thrombolysis in combination with EVT (p = 0.030). The mothership model showed longer call-to-door time (median + 23 min, p < 0.005), but shorter door-to-needle (median - 31 min, p = 0.001), and door-to-groin time (- 82.5 min, p < 0.001). We found no effects of the stroke network model on the 3-month mRS (ordinal shift analysis, p = 0.753). CONCLUSIONS: The shift to the mothership model during the COVID-19 pandemic guaranteed quicker EVT without significantly delaying IVT.

IV thrombolysis plus thrombectomy versus IV thrombolysis alone for minor stroke with anterior circulation large vessel occlusion from the IRETAS and Italian SITS-ISTR cohorts.

INTRODUCTION: The aim of this study was to compare the outcomes of patients treated with intravenous thrombolysis (IVT) <4.5 h after symptom onset plus mechanical thrombectomy (MT) <6 h with those treated with IVT alone <4.5 h for minor stroke (NIHSS ≤5) with large vessel occlusion (LVO) in the anterior circulation. PATIENTS AND METHODS: Patients enrolled in the Italian Registry of Endovascular Treatment in Acute Stroke (IRETAS) and in the Italian centers included in the SITS-ISTR were analyzed. RESULTS: Among the patients with complete data on 24-h ICH type, 236 received IVT plus MT and 382 received IVT alone. IVT plus MT was significantly associated with unfavorable shift on 24-h ICH types (from no ICH to PH-2) (OR, 2.130; 95% CI, 1.173-3.868; p=0.013) and higher rate of PH (OR, 4.363; 95% CI, 1.579-12.055; p=0.005), sICH per ECASS II definition (OR, 5.527; 95% CI, 1.378-22.167; p=0.016), and sICH per NINDS definition (OR, 3.805; 95% CI, 1.310-11.046; p=0.014). Among the patients with complete data on 3-month mRS score, 226 received IVT plus MT and 262 received IVT alone. No significant difference was reported between IVT plus MT and IVT alone on mRS score 0-1 (72.1% versus 69.1%), mRS score 0-2 (79.6% versus 79%), and death (6.2% versus 6.1%). CONCLUSIONS: Compared with IVT alone, IVT plus MT was associated with unfavorable shift on 24-h ICH types and higher rate of 24-h PH and sICH in patients with minor stroke and LVO in the anterior circulation. However, no difference was reported between the groups on 3-month functional outcome measures.

Mechanical thrombectomy in patients with heart failure: the Italian registry of Endovascular Treatment in Acute Stroke.

BACKGROUND: Heart failure (HF) is the second most important cardiac risk factor for stroke after atrial fibrillation (AF). Few data are available on mechanical thrombectomy (MT) in acute ischemic stroke (AIS) patients with HF. METHODS: The source of data is the multicentre Italian Registry of Endovascular Treatment in Acute Stroke (IRETAS). All AIS patients ≥ 18 years receiving MT were categorised in two groups: HF and no-HF. Baseline clinical and neuroradiological findings on admission were analysed. RESULTS: Of 8924 patients, 642 (7.2%) had HF. Compared to the no-HF group, HF patients had higher prevalence of cardiovascular risk factors. Rate of complete recanalisation (TICI 2b-3) was 76.9% in HF vs 78.1% in no-HF group (p = 0.481). Rate of symptomatic intracerebral haemorrhage at 24-h non-contrast computed tomography (NCCT) was 7.6% in HF vs 8.3% in no-HF patients (p = 0.520). At 3 months, 36.4% of HF patients and 48.2% of no-HF patients (p < 0.001) had mRS 0-2, and mortality was, respectively, 30.7% and 18.5% (p < 0.001). In multivariate logistic regression, HF was independently associated with mortality at 3 months (OR 1.53, 1.24-1.88 95% CI, p < 0.001). In multivariate ordinal regression, HF patients had a probability of transitioning to a higher mRS level of 1.23 (1.05-1.44 95% CI, p = 0.012). The propensity score analysis of two groups matched for age, sex, and NIHSS at admission yielded the same results. CONCLUSION: MT is safe and effective in HF patients with AIS. Patients with HF and AIS suffered from higher 3-month mortality and unfavourable outcome regardless of acute treatments.

Reperfusion strategies in stroke due to isolated cervical internal carotid artery occlusion: systematic review and treatment comparison.

INTRODUCTION: Despite intravenous thrombolysis (IVT) and endovascular treatment (EVT) have been demonstrated effective in acute ischemic stroke (AIS) due to large vessel occlusions, there are still no conclusive data to guide treatment in stroke due to cervical internal carotid artery (ICA) occlusion. We systematically reviewed available literature to compare IVT, EVT, and bridging (IVT + EVT) and define optimal treatment. METHODS: Systematic review followed predefined protocol (Open-Science-Framework osf.io/bfykj ). MEDLINE, EMBASE, and Cochrane CENTRAL were searched. Results were restricted to studies in English, with sample size ≥ 10 and follow-up ≥30 days. Primary outcomes were favorable outcome (mRS ≤ 2), mortality, and symptomatic intracerebral hemorrhage(sICH), defined according to study original report. Newcastle-Ottawa scale was used for bias assessment. RESULTS: Seven records of 930 screened were included in meta-analysis. Quality of studies was low-to-fair in 5, good in 2. IVT (n = 450) did not differ for favorable outcome and mortality compared to EVT (n = 150), though having lower rate of sICH (OR = 0.4, 95% CI 0.2-0.8). Compared to IVT, bridging (IVT + EVT) was associated with higher rate of favorable outcome (OR = 2.2, 95% CI 1.3-3.7). Compared to EVT, bridging (IVT + EVT) provided higher rate of favorable outcome (OR = 1.9, 95% CI 1.1-3.4), with a marginally increased risk of sICH (OR = 2.1, 95% CI 1-4.4) but similar mortality rates. CONCLUSIONS: Our systematic review highlights that, in acute ischemic stroke associated with isolated cervical ICA occlusion, bridging (IVT + EVT) might lead to higher rate of functional independence at follow-up, without increasing mortality. The low quality of available studies prevents from drawing firm conclusions, and randomized-controlled clinical trials are critically needed to define optimal treatment in this AIS subgroup.

Impact of COVID-19 pandemic on acute stroke care: facing an epidemiological paradox with a paradigm shift.

BACKGROUND: During the coronavirus disease 2019 (COVID-19) outbreak, a decrease of stroke's hospital admissions and reperfusion therapy has been reported worldwide. This retrospective observational study assessed the volume of stroke cases managed in the Emergency Department (ED) and reperfusion therapies in an Italian stroke network with a high incidence of COVID-19, particularly to evaluate if the in-hospital rerouting and the switch from a drip-and-ship to a mothership model could assure an adequate volume of acute treatments. METHODS: We compared data from March 2020 with those from previous years and formulated five PICO questions regarding (1) incidence of stroke cases in the ED; (2) relation between stroke cases and COVID-19; (3) differences in the number of reperfusion therapies, (4) in the call-to-needle and door-to-needle times for intravenous thrombolysis, and (5) in the call-to-groin and door-to-groin times for thrombectomy. RESULTS: We found (1) a 28% decreased of confirmed stroke cases managed in the ED, (2) a negative correlation between stroke cases in ED and COVID-19 progression (rs = - .390, p = .030), and (3) a similar number of treatments in March 2020 and March 2019. The adoption of the mothership model (4) did not delay alteplase infusion (median call-to-needle p = .126, median door-to-needle p = .142) but led to (5) a significant reduction in median call-to-groin (p = .018) and door-to-groin times (p = .010). CONCLUSION: The "hospital avoidance" of stroke patients during the "stay-at-home" appeals needs to be considered for future public health campaigns. A prompt reorganization of the stroke network can guarantee optimal performances at times of crisis.

Headache in neurological emergency.

Headache represents the second neurological cause of emergency room admittance. The differentiation of the small number of patients with life-threatening headaches from the overwhelming majority with benign primary headaches is an important problem in the emergency department since the misdiagnosis of a secondary headache can have serious consequences, including permanent neurologic deficits and death. The presence of one or more high-risk features (red flags) in patient clinical history or neurological examination warrants an urgent diagnostic workup including blood tests, neuroradiological studies, and lumbar puncture.

Leading symptoms in cerebrovascular diseases: what about headache?

Headache is a milestone in cerebrovascular disorders; indeed, it may represent the only symptom at onset or predominates over the other neurological features. Unfortunately, headache associated with cerebrovascular diseases lacks clear-cut characteristics as it may resemble a migraine attack, tension-type headache, or cluster headache; pain localization is also misleading along with drug (analgesic) response. However, in this review, we have analyzed and described the most common patterns of headache for different vascular disorders: it is known that headache due to subarachnoid aneurysmal hemorrhage presents peculiar characteristics (thunderclap, acute presentation, and high intensity), whereas in cerebral vasoconstriction syndrome, the short duration and the relapsing-remitting course of the thunderclap headache are key points for the diagnosis; in cervicocerebral artery, dissection pain is most commonly ipsilateral to the dissected vessel and is mainly perceived in the temporal area in case of carotid artery dissection and in the occipital area in case of vertebral artery dissection; in cerebral venous thrombosis, pain is often acute or subacute and severe; unfortunately, it may resemble a typical migraine attack or a tension-type episode; by the contrary, in primary angiitis of the central nervous system, pain is always subacute or chronic with mild-to-moderate intensity; finally, in brain arteriovenous shunts such as malformation or fistula, pain is more frequently a clue for disease complication such as hemorrhage from the malformation or thrombosis of the draining vein.

Migraine and cerebrovascular disease: still a dangerous connection?

Migraine is a common type of headache in young adults, with an estimated prevalence of 4% before puberty and as high as 25% in women by their mid to late 30s. About one third of migraineurs experience transient neurological symptoms known as auras, which characterize a variant known as migraine with aura. Many evidences have shown an increased risk of vascular events in patients affected by migraine, particularly among women and among migraine patients with aura. Potential underlying mechanisms include endothelial dysfunction, hypercoagulability, platelet aggregation, vasospasm, cardiovascular risk factors, paradoxical embolism, spreading depolarization, shared genetic risk, use of non-steroidal anti-inflammatory drugs, and immobilization. The risk of vascular events in migraine patients is also linked by concomitant oral contraception; moreover, the common finding of increased incidence of right to left cardiac shunt in migraine patients might have a pathogenetic role. Finally, many MRI studies in migraine patients, particularly in migraine with aura, have shown subcortical lesions particularly in the cerebellum as a common finding. In this review, we analyzed the more recent findings regarding the topic of migraine as a risk factor in stroke.

Endovascular Treatment of Acute Basilar Artery Occlusion: Registro Endovascolare Lombardo Occlusione Basilar Artery (RELOBA) Study Group Experience.

BACKGROUND: Acute basilar artery occlusion (BAO) is considered among the most severe medical emergencies, with very high morbidity and mortality. The aims of this study are to present 5 years experience of 12 centers in Lombardy region on BAO endovascular treatment and to evaluate prognostic factors that may improve clinical outcomes and recanalization rates. MATERIALS AND METHODS: Registro Endovascolare Lombardo Occlusione Basilar Artery (RELOBA) registry is a retrospective multicentric collection of patients with acute BAO who underwent endovascular treatment between 2010 and 2015. A total of 102 patients (mean age 65 years) were included. Clinical, procedural, and neuroradiological data were collected. Angiographic results (Treatment in Cerebral Ischemia scale [TICI] score 2b-3) were assessed by each center's interventional neuroradiologist. Good clinical outcome was considered as a modified Rankin Scale score ranging between 0 and 2 in a 3-month follow-up. RESULTS: Thirty-nine percent of patients showed good clinical outcome at 3 months. Mortality rate was 30%. TICI 2b-3 was achieved in 62% of patients. Univariate analysis showed that age, National Institutes of Health Stroke Scale (NIHSS) at onset, time to recanalization, and TICI score were all statistically significant clinical outcome predictors (P < .05). Multivariate logistic regression showed that time to recanalization, age, and NIHSS at onset were significant independent predictors of good outcome. CONCLUSIONS: BAO treatment needs more efforts to assure patients better clinical outcomes. Mechanical thrombectomy is feasible and effective in patients with acute BAO. These results must be confirmed by further prospective studies within randomized controlled settings.

Headache and endovascular procedures.

The International Classification of Headache Disorders (ICHD-3 beta) includes headache attributed to intracranial endovascular procedures (EVPs). The aim of this review is to describe the clinical and pathophysiological aspects of headache related to vascular lesions and EVPs. Current studies regarding this issue are contradictory, although generally favouring headache improvement after EVPs. Further large studies are needed to adequately assess the effect of EVPs on headache.

Stroke-like attack: first episode of sporadic hemiplegic migraine.

Hemiplegic migraine (HM) is a rare migraine with aura; it can be familiar or sporadic. A 46-years-old man presented left migraine followed by right hemiparesis with bilateral plantar flexion of cutaneous plantar reflex (CPR). Brain CT and CT-angiography were normal. The next day patient got worse. The EEG showed left fronto-temporal cuspidate delta waves and brain MRI showed a minimal hyperintensity at T2-sequences in the left frontal cortex with a minor representation of the cortical veins at susceptibility weighted imaging sequences. After 3 days, he had a progressive neurological improvement. After 2 weeks, EEG and brain MRI were normal. He was discharged with diagnosis of probably first attack of sporadic HM and after 8 months he was asymptomatic. The normal CPR on the hemiplegic side might be a clinical marker of functional hemiplegia. For the international classification of headache disorder (ICHD-3) two attacks are necessary for HM diagnosis. We propose for the first attack of HM to make diagnosis of "probable" HM as expected to the same ICHD-3 for migraine. Further studies are necessary to support our hypotheses.

The Italian Registry of Endovascular Treatment in Acute Stroke: rationale, design and baseline features of patients.

Endovascular treatment (ET) showed to be safe in acute stroke, but its superiority over intravenous thrombolysis is debated. As ET is rapidly evolving, it is not clear which role it may deserve in the future of stoke treatments. Based on an observational design, a treatment registry allows to study a broad range of patients, turning into a powerful tool for patients' selection. We report the methodology and a descriptive analysis of patients from a national registry of ET for stroke. The Italian Registry of Endovascular Treatment in Acute Stroke is a multicenter, observational registry running in Italy from 2010. All patients treated with ET in the participating centers were consecutively recorded. Safety measures were symptomatic intracranial hemorrhage, procedural adverse events and death rate. Efficacy measures were arterial recanalization and 3-month good functional outcome. From 2008 to 2012, 960 patients were treated in 25 centers. Median age was 67 years, male gender 57 %. Median baseline NIHSS was 17. The most frequent occlusion site was Middle cerebral artery (46.9 %). Intra-arterial thrombolytics were used in 165 (17.9 %) patients, in 531 (57.5 %) thrombectomy was employed, and 228 (24.7 %) patients received both treatments. Baseline features of this cohort are in line with data from large clinical series and recent trials. This registry allows to collect data from a real practice scenario and to highlight time trends in treatment modalities. It can address unsolved safety and efficacy issues on ET of stroke, providing a useful tool for the planning of new trials.

Mechanical Thrombectomy in Ischemic Stroke with a Large Infarct Core: A Meta-Analysis of Randomized Controlled Trials.

Background/Objectives: Endovascular treatment (EVT) is recommended for acute ischemic stroke due to large-vessel occlusion (LVO) and an Alberta Stroke Program Early CT Score (ASPECTS) ≥ 6. Randomized controlled trials (RCTs) have recently become available on EVT effects in people with LVO-related large core stroke (ASPECTS 0-5). Here, we provide an updated meta-analysis of the EVT effect on functional neurological status in people with large-core stroke. Methods: The study followed the PRISMA guidelines. PubMed, EMBASE and Cochrane Central were searched for RCTs comparing EVT vs. best medical treatment (BMT) in large-core LVO stroke. The primary outcome was functional independence at 90 days (modified Rankin Scale; mRS 0-2). The secondary outcomes were symptomatic intracranial hemorrhage (sICH), good functional outcome (mRS 0-3) and excellent functional outcome (mRS 0-1). EVT vs. BMT was compared through random effect meta-analysis. Heterogeneity was assessed with the I2 and Q test and risk of bias reported according to the RoB2 tool. Results: Six RCTs were included (n = 1656 patients). All studies had a moderate risk of bias, with blinding bias due to the nature of the intervention, potential allocation bias and incomplete outcome reporting. Functional independence was significantly more frequent in the EVT vs. BMT group (OR = 2.47, 95% CI = 1.52-4.03, p < 0.001). sICH rates (OR = 1.77, 95% CI = 1.01-3.11, p = 0.04) and good functional outcome (OR = 2.20; 95% CI = 1.72-2.81, p < 0.001) were more frequent in the EVT vs. BMT group, while the rates of mRS 0-1 did not differ. Conclusions: In patients with large-core stroke and LVO, EVT plus BMT as compared to BMT alone carries a significant increase in independent ambulation and good functional outcome at 3 months despite the marginal increase in sICH.

18FFlutemetamol-PET Aided Classification of Cerebral Amyloid Angiopathy: A Multicenter Study.

OBJECTIVES: Cerebral amyloid angiopathy (CAA)-related features on neuroimaging often coexist with signs of arteriolosclerosis-small vessel disease on neuroimaging in people with intracranial hemorrhage (ICH). This study aimed at defining the value of amyloid pathology detected by 18Fflutemetamol PET in reclassification and stratification of risk of bleeding in people with mixed CAA-arteriolosclerosis features. METHODS: We included consecutive patients admitted to 2 institutions (2018-2023) with spontaneous symptomatic ICH, subarachnoid hemorrhage (SAH), transient focal neurologic episodes (TFNE), or cognitive impairment and MRI showing CAA hallmarks. All patients underwent brain magnetic resonance imaging (MRI) with susceptibility weighted imaging and 18Fflutemetamol PET imaging and were followed up for at least 1 year. We compared cases with CAA and arteriolosclerosis + CAA features and defined long-term outcomes (composite outcome including death, ICH, ischemic stroke, SAH, TFNE) depending on PET status (CAA/amyloid pathology vs arteriolosclerosis-predominant groups). RESULTS: Among 47 patients, according to PET and MRI imaging, 38 patients were reclassified in the CAA/amyloid pathology group and 9 in the arteriolosclerosis-predominant group, with similar cardiovascular risk factors but a significantly higher lobar microbleed burden for the former group. The CAA/amyloid pathology group had higher rates of composite outcome (43.9 vs 11.1 events per 100 patient-year; p = 0.039) and ICH (36.5 vs 5.6 events per 100 patient-years; p = 0.04) compared with the arteriolosclerosis-predominant group. DISCUSSION: 18FFlutemetamol PET imaging can help in reclassification of mixed arteriolosclerosis + CAA into CAA/amyloid pathology and arteriolosclerosis-predominant, with implications on long-term risk of recurrent events. CLASSIFICATION OF EVIDENCE: This study provides Class IV evidence that 18Fflutemetamol PET can distinguish between CAA + arteriolosclerosis and arteriolosclerosis-predominant pathology.

Stress hyperglycemia is associated with futile recanalization in patients with anterior large vessel occlusion undergoing mechanical thrombectomy.

INTRODUCTION: Mechanical thrombectomy (MT) is the standard treatment for acute ischemic stroke (AIS) due to anterior large vessel occlusion (LVO). Despite successful recanalization, some patients remain disabled after 3 months. Mechanisms that can cause futile recanalization (FR) are still largely unknown. We investigated if stress hyperglycemia might be associated with FR. PATIENTS AND METHODS: This is a retrospective analysis of consecutive patients with successful recanalization treated in four participating centers between January 2021 and December 2022. According to the modified Rankin scale (mRS) status at 3 months, patients were divided into two groups: FR, if mRS score >2, and useful recanalization (UR), if mRS score ⩽2. Stress hyperglycemia was estimated by the glucose-to-glycated hemoglobin ratio (GAR) index. RESULTS: A total of 691 subjects were included. At 3 months, 403 patients (58.3%) were included in the FR group, while the remaining 288 patients (41.7%) were included in the UR group. At the multivariate analysis, variables independently associated with FR were the following: age (OR 1.04, 95% CI 1.02-1.06, p < 0.001), GAR index (OR 1.08, 95% CI 1.03-1.14, p = 0.003), NIHSS at admission (OR 1.16, 95% CI 1.11-1.22; p < 0.001), and procedure length (OR 1.01, 95% CI 1.00-1.02; p = 0.009). We observed that the model combining age, GAR index, NIHSS at admission, and procedure length had good predictive accuracy (AUC 0.78, 95% CI 0.74-0.81). CONCLUSIONS: Stress hyperglycemia predicts FR in patients with successful recanalization after MT. Further studies should explore if managing stress hyperglycemia may reduce futile recanalization. Additionally, we recommend paying close attention to AIS patients with a GAR index greater than 24.8 who exhibit a high risk of FR.

Predictors of futile recanalization in nonagenarians treated with mechanical thrombectomy: a multi-center observational study.

BACKGROUND: There is a lack of data regarding patients aged 90 years or older undergoing mechanical thrombectomy and their predictors of futile recanalization. AIMS: We sought to evaluate the predictors of futile recanalization in patients ≥ 90 years with large vessel occlusion undergoing mechanical thrombectomy. METHODS: This multi-center observational retrospective study included patients ≥ 90 years consecutively treated with mechanical thrombectomy in four thrombectomy capable centers between January 1st, 2016 and 30th March 2023. Futile recanalization was defined as large vessel occlusion patients experiencing a 90-day poor outcome (mRS 3-6) despite successful recanalization (mTICI ≥ 2b) after mechanical thrombectomy. RESULTS: Our cohort included 139 patients ≥ 90 years with acute ischemic stroke due to anterior circulation large vessel occlusion treated with mechanical thrombectomy. One hundred seventeen of one hundred thirty-nine patients ≥ 90 years who achieved successful recanalization were included in the analysis (seventy-six female (64.9%)), of whom thirty-one (26.49%) experienced effective recanalization and eighty-six (73.51%) experienced futile recanalization. Patients with futile recanalization had higher NIHSS on admission (p < 0.001); they were less frequently treated with intravenous thrombolysis (p = 0.048), had more often general anesthesia (p = 0.011), and longer door to groin puncture delay (p = 0.002). Univariable regression analysis showed that use of intravenous thrombolysis (0.29, 95% CI 0.02-0.79, p = 0.034) and site of occlusion distal vs proximal (0.34, 95% CI 0.11-0.97, p = 0.044) were associated with reduced probability of futile recanalization while NIHSS on admission (1.29, 95% CI 1.16-1.45, p < 0.001), NIHSS at 24 h (1.15, 95% CI 1.07-1.25, p = 0.002), type of anesthesia used (4.18, 95% CI 1.57-11.08, p = 0.004), and door to groin puncture time (1.02, 95% CI 1.00-1.05, p = 0.005) were associated with increased probability of futile recanalization. Multivariable regression analysis showed that use of intravenous thrombolysis (0.44, 95% CI 0.09-0.88, p = 0.039) was associated with reduced probability of futile recanalization. CONCLUSION: Our study seems to suggest that mechanical thrombectomy with intravenous thrombolysis is associated with reduced probability of futile recanalization in a multi-center cohort of patients aged 90 years or older.