Mechanical Thrombectomy Research Articles

Mechanical Thrombectomy Access Score: A Systematic Review and Modified Delphi of Global Barriers to Endovascular Therapy.

The availability of mechanical thrombectomy (MT) for acute ischemic stroke is limited, and vast disparities exist between countries. We aim to create a MT access score to measure the drivers of access to help quantify and accelerate treatment worldwide. We used a systematic review complemented by a modified Delphi method. In the first of 3 rounds, 4 independent investigators performed a systematic literature review using key search terms that drive MT access, following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. In the second round, a panel of 6 anonymous international experts selected key attributes needed for scoring. In the final round, a total of 12 attributes were selected on consensus, each given a score on a 0 to 3 scale. An ultimate MT access score (range, 0-36) was proposed as a new tool to use in identifying barriers to MT access and assist in providing an initial framework for public health interventions. Of 2864 abstracts screened, 121 studies were included in the final systematic review. A total of 34 attributes that potentially drive MT access were initially identified. In the final round, 12 attributes were selected by the expert panel: public awareness, emergency medical services transportation, prehospital large vessel occlusion screening, interhospital transfer policy, emergency department protocols, stroke imaging protocols, emergency department stroke expertise or telestroke availability, interventionalists, MT-capable centers, device availability, and insurance coverage. These attributes were weighted as part of the final score of 0 to 36. The MT access score represents the first tool to quantify barriers to global MT access. Its implementation stands not just as an academic achievement but as a beacon of hope for improving stroke care and outcomes worldwide, bringing us a step closer to bridging the gap in stroke treatment disparities.

Predictors and Outcomes of Excellent Recanalization Versus Successful Recanalization After Thrombectomy in Proximal and Distal Medium Vessel Occlusion Strokes: A Multinational Study

BACKGROUND Acute ischemic stroke arising from medium vessel occlusions (MeVO) poses substantial challenges in treatment and management. This study aims to elucidate the outcomes and factors contributing to achieving excellent recanalization (modified Thrombolysis in Cerebral Infarction [mTICI] 2c–3) versus successful recanalization (mTICI 2b) in patients with MeVO stroke undergoing mechanical thrombectomy (MT). METHODS We conducted a multinational study analyzing data from the MAD‐MT (Multicenter Analysis of Distal Medium Vessel Occlusions: Effect of Mechanical Thrombectomy) registry, encompassing 37 centers across North America, Asia, and Europe, collected between September 2017 and July 2023. The study included acute ischemic stroke patients with MeVO treated with MT, with or without intravenous thrombolysis, who achieved mTICI 2b–3 post‐MT. RESULTS Among 1463 patients with successful recanalization (mTICI 2b–3), 523 achieved mTICI 2b recanalization, and 940 achieved mTICI 2c–3. Distal occlusions exhibited higher odds of excellent recanalization compared with proximal MeVO vessel occlusions (odds ratio, 1.58; 95% CI, 1.17–2.15; P = 0.003). Cardioembolic stroke pathogenesis was associated with a higher likelihood of excellent recanalization (1.67; 95% CI, 1.07–2.59; P = 0.018). Patients achieving mTICI 2c–3 recanalization demonstrated lower initial National Institutes of Health Stroke Scale scores, significant improvements in postprocedural National Institutes of Health Stroke Scale shift, and a higher percentage of favorable 90‐day outcomes compared with those with mTICI 2b. However, no significant difference in 90‐day mortality rates was observed. CONCLUSION This study underscores that among patients with MeVO stroke with successful recanalization (mTICI 2b–3) there is higher likelihood of achieving excellent recanalization (mTICI 2c–3) in distal occlusions and cardioembolic pathogenesis. mTICI 2c–3 scores post‐MT correlate with improved clinical outcomes compared with mTICI 2b, affirming the superiority of excellent recanalization over successful recanalization in patients with MeVO stroke. Further prospective studies and randomized controlled trials are warranted for validation.

Frictional forces in stent retriever procedures: The impact of vessel diameter, angulation, and deployment position.

Mechanical thrombectomy has improved the outcome of patients with acute ischemic stroke, but complications such as subarachnoid hemorrhage (SAH) can worsen the prognosis. This study investigates the frictional forces exerted by stent retrievers (SRs) on vessel walls, hypothesizing that these forces contribute to vascular stress and a risk of hemorrhage. We aimed to understand how vessel diameter, curvature, and stent deployment position influence these forces. Using a silicone vascular model simulating the middle cerebral artery, we created virtual vessels with diameters of 2.0 mm and 2.5 mm, each with branching angles of 60° and 120°. A Trevo NXT (4 × 28 mm) SR was deployed and retracted through these models, measuring the maximum static frictional force at the moment the SR began to move. The stent deployment position relative to the curvature (straight, distal 1/4, center, and proximal 1/4) was also varied to assess its impact on frictional forces. Each condition was tested 15 times, and the results were statistically analyzed. The highest frictional force was observed in the 2.0 mm/120° model, followed by the 2.0 mm/60°, 2.5 mm/120°, and 2.5 mm/60° models. Narrower and more sharply curved vessels exhibited significantly higher frictional forces. Friction also increased with more distal stent deployment, particularly in the narrower vessels. Smaller vessel diameters, greater curvature, and more distal stent deployment positions increase frictional forces during thrombectomy, potentially leading to SAH. These findings highlight the importance of selecting appropriately sized SRs and considering stent deployment positions to minimize vascular stress.

Iodine-Based Dual-Energy Computed Tomography After Mechanical Thrombectomy Predicts Secondary Neurologic Decline from Cerebral Edema After Severe Stroke.

Patients with severe stroke are at high risk of secondary neurologic decline (ND) from the development of malignant cerebral edema (MCE). However, early infarcts are hard to diagnose on conventional head computed tomography (CT). We hypothesize that high-energy (190keV) virtual monochromatic imaging (VMI) from dual-energy CT (DECT) imaging enables earlier detection of ND from MCE. Consecutive patients with severe stroke with National Institute of Health Stroke Scale (NIHSS) scores > 15 and DECT within 10h of mechanical thrombectomy from May 2020 to March 2022 were included. We excluded patients with parenchymal hematoma type 2 transformation. Retrospective analysis of clinical and novel variables included the VMI Alberta Stroke Program Early CT Score (ASPECTS), total iodine content, and VMI infarct volume. The primary outcome was secondary ND, defined using a composite outcome variable of clinical worsening (increase in NIHSS score ≥ 4 or decrease in Glasgow Coma Scale score > 2) or malignant radiographical edema (midline shift ≥ 5mm at the level of the septum pellucidum). Fisher's exact test and Wilcoxon's test were used for univariate analysis. Logistic regression was used to develop prediction models for categorical outcomes. Eighty-four patients with severe stroke with a median age of 67.5 (interquartile range [IQR] 57-78) years and an NIHSS score of 22 (IQR 18-25) were included. Twenty-nine patients had ND. The VMI ASPECTS, total iodine content, and VMI infarct volume were associated with ND. The VMI ASPECTS, VMI infarct volume, and total iodine content were predictors of ND after adjusting for age, sex, initial NIHSS score, and tissue plasminogen activator administration, with areas under the receiver operating characteristic curve (AUROC) of 0.691 (95% confidence interval [CI] 0.572-0.810), 0.877 (95% CI 0.800-0.954), and 0.845 (95% CI 0.750-0.940). By including all three predictors, the model achieved an AUROC of 0.903 (95% CI 0.84-0.97) and was cross-validated by the leave one out method, with an AUROC of 0.827. The VMI ASPECTS and VMI infarct volume from DECT are superior to the conventional CT ASPECTS and are novel predictors for secondary ND due to MCE after severe stroke. Clinical trial registration ClinicalTrials.gov identifier: NCT04189471.

Left, Then Right ICA Dissection: A Case Report

ABSTRACT IntroductionWe present a unique case report of a patient who presented to the emergency departmentwith stroke-like symptoms found to have a spontaneous left sided internal carotid arterydissection. Case ReportThe patient was treated successfully with thrombectomy, and subsequently developedcontralateral symptoms caused by a right sided internal carotid artery dissection. This wasmanaged with a second contralateral thrombectomy. The patient’s course was complicated bypersistent and mild hypotension, postulated to be secondary to bilateral carotid baroreceptortrauma from the dissections. ConclusionThis case highlights the importance of close neurological monitoring for patients,preferably in a neurologic critical care setting, during and after invasive treatments such assystemic thrombolytic administration or mechanical thrombectomy, as identifying the patient’ssubsequent development of contralateral symptoms in a timely fashion was key to his positive outcome. An additional factor which had a positive impact on this outcome was the use of the RAPID Artificial Intelligence software which assists in determining whether thrombectomy maybe indicated prior to receiving a formal radiologist read on CT angiography/perfusion studies. AI technologies such as this have a great potential to augment and expedite patient care.

Impact of fasting blood glucose on prognosis after acute large vessel occlusion reperfusion: results from a multicenter analysis.

To analyze the effect of fasting blood glucose levels after reperfusion of acute large vessel occlusion (ALVO) on patient functional prognosis. Retrospectively included ALVO patients from three large stroke centers in China, all of whom achieved vascular reperfusion after mechanical thrombectomy or bridging thrombolysis. The prognosis scores of all patients at 90 ± 7 days post-recanalization were categorized into a good prognosis group (mRS 0-2) and a poor prognosis group (mRS 3-6). The relationship between mean blood glucose levels at 72 h post-recanalization and prognosis was explored using multivariable logistic regression analysis. Then we measured the area under the ROC curve for all factors to assess their predictive performance. (1) Totally 2,056 patients were included in the study, with 1,488 males and 568 females. There were 1,370 patients in the good prognosis group (mRS 0-2) and 686 in the poor prognosis group (mRS 3-6). (2) The two groups exhibited significant differences in terms of age, preoperative mRS score, history of diabetes, and mean fasting blood glucose (MFBG) (p < 0.001). (3) With 90-day mRS as the outcome variable, all independent variables were included in Univariate and multivariate regression analyses analysis, and the results showed that: age, preoperative mRS score, history of diabetes, and MFBG are all independent predictors of prognosis after recanalization of ALVO, with MFBG demonstrating a higher predictive power than the other factors (AUC = 0.644). Various factors are correlated with the prognosis in patients who have undergone ALVO recanalization. Notably, the MFBG level demonstrates a significant predictive value for outcomes within the first 72 h following the recanalization procedure.

Safety and efficacy of bridging intravenous thrombolysis plus mechanical thrombectomy versus direct mechanical thrombectomy in different age groups of acute ischemic stroke patients.

To evaluate the safety and efficacy of bridging intravenous thrombolysis plus mechanical thrombectomy (MT) versus direct MT in different age groups of patients with acute ischemic stroke (AIS) secondary to large vessel occlusion (LVO) of the anterior circulation. Consecutive patients from the prospective endovascular stroke registry of the Comprehensive Stroke Center, University of Rome Tor Vergata, Italy, between January 2015 and June 2021 were retrospectively analyzed. Patients were divided into age groups (≤ 80 years old and > 80 years old); for each age group, they were further divided in the bridging therapy group and the direct MT group. We performed a propensity score analysis according to baseline characteristics. Safety outcomes were any intracerebral hemorrhage (ICH), symptomatic ICH (sICH) and 3-month mortality. Efficacy outcomes were successful recanalization (modified Thrombolysis in Cerebral Infarction, mTICI, score ≥ 2b) and 3-month functional independence (modified Rankin Scale, mRS, ≤ 2). We included 761 AIS patients with anterior circulation LVO (mean age 73.5 ± 12.8 years; 44.8% males; mean baseline NIHSS 16 ± 5). After propensity score, there were 365 patients ≤ 80 years old (52% bridging therapy) and 187 patients > 80 years old (57% bridging therapy). In both age groups of patients, we found no statistically significant differences in the rates of any ICH, sICH, successful recanalization and 3-month mortality and functional independence between bridging therapy and direct MT groups. In our population, safety and efficacy outcomes of bridging therapy versus direct MT did not differ in both AIS patients ≤ 80 and > 80 years old.

Comparative analysis of single plane and biplane angiography systems for mechanical thrombectomy for acute ischemic stroke: a systematic review and meta-analysis

BackgroundThe choice of angiography system could influence the outcomes of mechanical thrombectomy (MT) in the treatment of acute ischemic stroke (AIS), but its impact is not yet well understood. This...

Intraoperative contrast-enhanced cone beam CT allows visualization of the ‘dark side’ of the clot and improves mechanical thrombectomy performance

BackgroundVisualization of the clot is key to the endovascular treatment of ischemic stroke, but identification of the distal part of the clot and distal arteries during mechanical thrombectomy (MT) remains...

Contrast enhancement after mechanical thrombectomy: clinical correlations and impact on outcomes.

Contrast enhancement (CE) after mechanical thrombectomy (MT) remains a subject of investigation, with a reported prevalence ranging from 31 to 88%. We examined our patients to identify predictors of CE and its impact on outcomes, an aspect that remains understudied. We retrospectively analyzed 106 patients who underwent MT at our hospital between 2018 and 2022. The inclusion criteria involved patients who underwent two head CT scans: one immediately after the procedure and a repeat scan within 24h. This study compared demographic, clinical, laboratory, neuroimaging, and procedure-related variables between patients with CE and those without hyperdensity. Regression analysis was employed to determine the associations between CEs and significant variables. Among the analyzed patients, 32.1% had CE. Hyperlipidemia was more prevalent in the CE group. CE correlated with an increase in the National Institutes of Health Stroke Scale (NIHSS) score ≥ 4 within 24h, intracerebral hemorrhage (ICH) incidence, elevated NIHSS score, and a decreased rate of modified Rankin scale (mRS) 0-3 upon discharge. The adjusted model demonstrated a significant association between CE and the incidence of hyperlipidemia and ICH, with an increase in NIHSS score ≥ 4 within 24h of ICH and a lower mRS score of 0-3 upon discharge. CE is associated with hyperlipidemia, ICH, early neurological deterioration, and poor functional outcomes upon discharge. However, no similar association was shown for long-term outcomes. Further studies are required to clarify the pathophysiology of CE and its implications for optimizing stroke care.

Bridging the Gap: Improving Acute Ischemic Stroke Outcomes with Intravenous Thrombolysis Prior to Mechanical Thrombectomy.

Current guidelines recommend intravenous thrombolysis (IVT) followed by mechanical thrombectomy (MT) for patients with acute ischemic stroke (AIS) caused by large vessel occlusion (LVO). This combined approach, known as bridging therapy (BT), is believed to increase the likelihood of a favorable functional outcome when administered within 4.5 h of symptom onset. However, the benefits of BT over direct mechanical thrombectomy (d-MT) remain debated. This study aimed to compare the outcomes of AIS-LVO patients undergoing MT within 6 h of symptom onset, with and without prior IVT. Within the prospective Transzlációs Idegtudományi Nemzeti Laboratórium (TINL) STROKE-registry, AIS-LVO patients admitted to the Department of Neurology, University of Pécs between February 2023 and June 2024 were investigated. The primary endpoint was the proportion of patients reaching functional independence at 90 days, defined as a modified Rankin Scale (mRS) score of 0-2. Secondary endpoints included clinical improvement at 72 h (National Institute of Health Stroke Scale [NIHSS] score of ≤1 or a change from baseline [ΔNIHSS] of ≥4) and successful recanalization (modified Thrombolysis in Cerebral Infarction [mTICI] score ≥ 2). Safety outcomes were evaluated based on thrombus migration and intracranial hemorrhage (ICH). Results were compared using linear and logistic regression analyses adjusted for baseline variables. Of 82 patients, 51 (62.2%) received BT, while 31 (37.8%) underwent d-MT. The BT group showed a significantly higher rate of functional independence (45.7% vs. 17.2%, p = 0.014) and a lower 90-day mortality rate (13.7% vs. 35.5%, p = 0.029). Multivariate analysis revealed that IVT was independently associated with favorable functional outcomes (p = 0.011) and reduced mortality (p = 0.021). No significant differences were observed in terms of clinical improvement at 72 h, successful recanalization, thrombus migration, or hemorrhagic transformation between the groups. This study supports current guidelines recommending BT for thrombectomy-eligible AIS-LVO patients, offering new insights into the ongoing clinical debate.

Safety and outcomes with use of FlowTriever for mechanical thrombectomy i n acute pulmonary embolism

Objectives: Mortality in the pulmonary embolism (PE) risk categories has historically been reported between 30% and 40% in high-risk and &lt;15% in intermediate-risk group. In those who survive, there is a high rate of morbidity with dyspnea and exercise intolerance. Advanced therapies with a favorable safety profile have the potential to improve outcomes. We present the largest single-center data set studied to-date for safety, mortality, and outcomes post-mechanical thrombectomy including functional assessment 3 months post-discharge. Material and Methods: We analyzed retrospective database of patients with PE undergoing catheter directed mechanical thrombectomy (CDMT). We report clinical characteristics and outcomes stratified by PE risk categories. Comparison in the groups has been made using analysis of variance method. Results: A total of 365 patients were evaluated in the CDMT group. Among these 81 (22%) presented with high-risk and 261 (71%) with intermediate-risk PE. The average age at diagnosis was 61 ± 17 years with male-to-female distribution ratio of 1.2. Most common risk factors being reduced mobility (18%), malignancy (15%), recent surgery (13%), and hormonal therapy (12%). Mortality within 30 days of PE diagnosis was 8.6% (7/81) in high-risk, 1.7% (4/230) in intermediate-high-risk groups. There were no deaths in intermediate-low and low-risk group post-CDMT. Before thrombectomy, 349 (95%) patients had right heart strain, 307 (84%) had elevated troponin, and 197 (54%) had elevated B-type natriuretic peptide. Post-procedure echocardiogram at 3 month revealed improvement in the right ventricular (RV) fractional area change (27.53 ± 10.38% to 39.73 ± 8.3%, P &lt; 0.01), tricuspid annular plane systolic excursion (10.9 ± 8.3 mm to 21.81 ± 4.75 mm), and RV systolic pressure (43.96 ± 14.48 mmHg to 28.47 ± 7.88 mmHg, P &lt; 0.01). At 3 months post-thrombectomy, the majority (74%) of the patients fell into non-to-negligible functional limitation. Conclusion: We present a descriptive analysis of outcomes including improved mortality, and functional assessment of patients undergoing CDMT.

The Effect of Systemic Inflammatory Response on Mechanical Thrombectomy is Partly Mediated by Pre-thrombectomy Cerebral Edema in Acute Stroke Patients.

To explore the effect of baseline Systemic Inflammatory Response reflected by platelet-to-lymphocyte ratio (PLR) and pre-thrombectomy cerebral edema reflected by Net Water Uptake (NWU) on futile recanalization in patients with Acute Ischemic Stroke (AIS) after successful thrombectomy, and to investigate the potential mediating role of baseline cerebral edema. 134 Patients with anterior circulation ischemic stroke receiving successful thrombectomy were retrospectively studied. Their demographic and clinical characteristics were collected at admission, and the NWU was quantitatively calculated based on baseline computed tomography (CT). The predictive value of PLR for futile recanalization and the relationship between PLR, NWU, and futile recanalization using mediation analysis were explored. Patients were followed up for 90 days and were divided into a futile recanalization group and a favorable prognosis group [90-day modified Rankin Scale score of 0-2]. High baseline PLR, NWU, no first-pass reperfusion, and large baseline ischemic core volume were independent predictors of futile recanalization after successful thrombectomy in patients with AIS. Mediation analysis results indicate that PLR may partially mediate the occurrence of futile recanalization through NWU. Baseline PLR and NWU were independent predictors of futile recanalization, and higher PLR and NWU values were associated with a higher likelihood of futile recanalization. The findings suggest that early cerebral edema reflected by a high NWU value may be a mediator of PLR-affecting prognosis.

Mechanical thrombectomy by stent retriever for the treatment of arterial ischemic stroke in a pediatric patient with acute lymphoblastic leukemia: A case report

Introduction: Arterial ischemic stroke (AIS) caused by occlusion of large vessels in childhood is a devastating rare condition that can contribute to long-term disabilities. Childhood leukemia is identified as a recognized risk factor for ischemic strokes. Mechanical thrombectomy is standard of care for large vessel occlusions in adults. However, there are still no definite recommendations regarding application and outcomes of endovascular thrombectomy and the devices used for pediatric patients with arterial ischemic stroke. Case presentation: We report a 13-year-old female with acute lymphoblastic leukemia who developed AIS due to thrombosis in the left internal carotid and proximal middle cerebral artery in the induction phase of treatment. The patient underwent successful mechanical thrombectomy via Solumbra by using “Embolus Retriever with Interlinked Cages (ERIC)” stent retriever and Sofia plus catheter which resulted in successful recanalization of ICA and MCA. Discussion: Selected pediatric patients with AIS due to large vessel occlusions can benefit from mechanical thrombectomy. Although the recently published literature demonstrated the efficacy and safety of MT in children, strong guideline recommendations are still absent. At present, the last AHA/ASA guidelines for early management of AIS recommends intravenous thrombolysis and endovascular therapy in adults, whereas controversy still exists in children. An urgent approach within the defined therapeutic time frame and a multidisciplinary team specialized in pediatric stroke with professional trained interventional neuroradiologist is essential for achieving optimal results. Conclusion: Mechanical thrombectomy provides promising results with high rates of arterial recanalization and favorable outcomes in pediatric patients with AIS.

Inadvertent Detachment of Stent Retrievers: Report of 2 Cases.

Mechanical thrombectomy using a stent retriever is a widely-used technique for recanalizing occluded cerebral arteries in acute ischemic stroke. Although rare, inadvertent stent detachment has primarily been reported with earlier stent retriever designs. We present 2 cases of inadvertent stent detachment with the pRESET stent. In the first case, an elderly patient presented with right middle cerebral artery occlusion and experienced stent detachment during the second retrieval. Despite this, successful recanalization was achieved through balloon angioplasty. In the second case, an elderly patient experienced stent detachment after the third retrieval, and recanalization of the M1 segment was unsuccessful due to the inability to pass the microcatheter. The first patient had a modified Rankin scale (mRS) score of 3, while the second had a poor prognosis with an mRS score of 5. These cases highlight that inadvertent stent detachment can impact outcomes, and balloon angioplasty may serve as a useful salvage therapy.

Association of critical hypoperfusion biomarkers on CT with futile recanalization and poor outcome after mechanical thrombectomy in acute ischemic stroke

Background and purposeWe aimed to investigate the association between critical perfusion delay and poor outcome among recanalized stroke patients with anterior large-vessel occlusion, and to use pretreatment hypoperfusion biomarkers on CT to predict futile recanalization even after successful thrombectomy.MethodsAn ischemic region with time-to-maximum (Tmax) > 12s–10s was defined as critical hypoperfusion, Tmax > 8s as moderate hypoperfusion, and hypoperfusion intensity ratio (HIR, volumetric ratio of Tmax > 10s / Tmax > 6s) represented for severity of critical hypoperfusion and rCBF < 30% for ischemic core. The associations between these CT perfusion characteristics and favorable or unfavorable outcome (mRS 0–2 versus 3–6) were analyzed in univariable regression, and a multivariable model was then used to predict futile recanalization.ResultsSeventy-nine stroke patients were included and had good grades of instant recanalization. Forty-two patients (53%) had poor outcomes, and they had a significantly larger volume of critical hypoperfusion as seen with Tmax > 10s and > 12s (P = 0.032 and 0.008, respectively), a larger volume of ischemic core (P = 0.011) and a higher HIR (P = 0.002) than those patients achieving good outcomes. In the univariable analysis, a lower HIR (OR, 0.008; 95%CI, 0.001–0.254, P = 0.006) was associated with favorable outcome. The volume size of Tmax > 12s was significantly and positively correlated with the size of ischemic core. A HIR value higher than 0.491 might predict a futile recanalization and poor outcome (AUC = 0.701).ConclusionsThe critical hypoperfusion biomarkers on CTP could be useful in triaging endovascular treatment and identifying stroke patients at risk of futile recanalization.

Cholesterol Crystal Embolism Following Mechanical Thrombectomy for Acute Ischemic Stroke

Cholesterol Crystal Embolism Following Mechanical Thrombectomy for Acute Ischemic Stroke

Endovascular therapy versus medical management in isolated posterior cerebral artery acute ischemic stroke: A multinational multicenter propensity score-weighted study.

Despite the proven effectiveness of endovascular therapy (EVT) in acute ischemic strokes (AIS) involving anterior circulation large vessel occlusions, isolated posterior cerebral artery (PCA) occlusions (iPCAo) remain underexplored in clinical trials. This study investigates the comparative effectiveness and safety of EVT against medical management (MM) in patients with iPCAo. This multinational, multicenter propensity score-weighted study analyzed data from the Multicenter Analysis of primary Distal medium vessel occlusions: effect of Mechanical Thrombectomy (MAD-MT) registry, involving 37 centers across North America, Asia, and Europe. We included iPCAo patients treated with either EVT or MM. The primary outcome was the modified Rankin Scale (mRS) at 90 days, with secondary outcomes including functional independence, mortality, and safety profiles such as hemorrhagic complications. A total of 177 patients were analyzed (88 MM and 89 EVT). EVT showed a statistically significant improvement in 90-day mRS scores (OR = 0.55, 95% CI = 0.30-1.00, p = 0.048), functional independence (OR = 2.52, 95% CI = 1.02-6.20, p = 0.045), and a reduction in 90-day mortality (OR = 0.12, 95% CI = 0.03-0.54, p = 0.006) compared to MM. Hemorrhagic complications were not significantly different between the groups. EVT for iPCAo is associated with better neurological outcomes and lower mortality compared to MM, without an increased risk of hemorrhagic complications. Nevertheless, these results should be interpreted with caution due to the study's observational design. The findings are hypothesis-generating and highlight the need for future randomized controlled trials to confirm these observations and establish definitive treatment guidelines for this patient population.

The Impact of the COVID-19 Pandemic on the Stroke Unit of a Portuguese Community Hospital.

It is essential to understand the consequences of the COVID-19 pandemic on stroke care, contemplating the potential health and economic consequences of missed diagnoses or treatments. This study examined the pandemic's effects on stroke epidemiology, clinical characteristics, and treatment in a hospital setting, comparing data from March 2020 to February 2021 with the homologous period the previous year. A secondary analysis focused on the state of emergency periods (March 19 to May 2 and November 6 to February 28). The sample included 730 stroke admissions, with 343 during the pandemic. There was a 24.75% reduction in the average daily occupancy rate (p<0.001) and a slight decrease in average daily admissions, especially in June from 132% to 74% (p=0.01). There was a moderate negative correlation between the number of COVID-19 cases and occupancy rates in January (r{s}=-0.422, p=0.01) and February (r{s}=-0.532, p=0.01). Admissions for ischemic stroke decreased by 7.2% (p=0.026), particularly mild events, with a 6.8% decrease in lacunar syndromes (p=0.048). Mechanical thrombectomy (MT) increased by 5.4% (p=0.046), while intravenous thrombolysis (IVT) decreased by 2.8% (p=0.048), especially in severe stroke cases (-21.4%, p=0.001). The pandemic period documented more MT procedures than IVT. Hemorrhagic stroke admissions increased by 6.7% (p=0.01). The analysis suggests a reduction in mild ischemic stroke admissions and fewer patients undergoing IVT for severe strokes during the pandemic. Broader-scale studies are necessary to confirm these findings. Considering the documented decline in diagnosis and treatment, minimizing the impact on stroke care during potential sanitary crises is paramount.

Association between serum calcium and in-hospital mortality in intensive care unit patients with cerebral infarction: a cohort study.

The relationship between serum calcium levels and the prognosis of cerebral infarction remains controversial. This study aims to investigate the correlation between serum calcium levels and in-hospital mortality in critically ill patients with ischemic stroke admitted to the intensive care unit (ICU). A retrospective cohort study was conducted using data from the MIMIC-IV database. Demographic and clinical data of all participants were collected including gender, age, hypertension, diabetes, myocardial infarction, heart failure, chronic obstructive pulmonary disease, hemoglobin, potassium, sodium, anion gap, platelets, white blood cells, glucose, creatinine, Glasgow coma score (GCS), IV-tPA administration (rt-PA), and mechanical thrombectomy (MT). The outcome measure was in-hospital death. Multivariable-adjusted logistic regression analysis, curve fitting, interaction analysis, and threshold effect analysis were employed to evaluate the relationship between serum calcium levels and in-hospital mortality among ICU patients with cerebral infarction. A total of 2,680 critically ill patients with cerebral infarction were enrolled, with a mean serum calcium level of 8.6 ± 0.8 mg/dL. The overall in-hospital mortality rate was 19.5%, where Group 1 (serum calcium < 8.0 mg/dL) had a mortality rate of 27.7%, Group 2 (serum calcium 8-9 mg/dL) had a rate of 19.8%, and Group 3 (serum calcium ≥ 9 mg/dL) had a rate of 13.9%. There was a non-linear, S-shaped relationship between serum calcium levels and in-hospital mortality. Serum calcium levels within the range of 7.70-9.50 mg/dL were found to be independently associated with increased in-hospital mortality in ICU patients with cerebral infarction. No significant interactions were detected in subgroup analyses, and the results of sensitivity analyses remained stable. Serum calcium levels are independently associated with in-hospital mortality in critically ill patients with cerebral infarction in the ICU setting. Within the range of 7.70-9.50 mg/dL, lower serum calcium levels increase the risk of in-hospital death among these patients, emphasizing the importance of close monitoring by ICU physicians.