Atypical Reversible Posterior Leukoencephalopathy Syndrome in Thrombotic Thrombocytopenic Purpura

A 32-year-old man with an atypical form of reversible leukoencephalopathy syndrome (RPLS) caused by thrombotic thrombocytopenic purpura (TTP) is reported. In this particular case, a timely diagnosis of TTP was established primarily on the clinical findings, which led to the early initiation of plasmapheresis and resulted in excellent clinical recovery. The pathophysiological aspects of the relationship between TTP and RPLS are discussed in light of the clinical and radiological features (including diffusion-and perfusion-weighted magnetic resonance imaging studies) of this case. The mechanism for TTP-associated, or TTP-induced, leukoencephalopathy is suggested to be independent of hypertension and vasoconstriction. TTP-associated endothelial injury can play a major role as the inciting mechanism for the development of RPLS.WoSScopu

Relationship between the first pass effect and the platelet-lymphocyte ratio in acute ischemic stroke

Purpose: The aim of this study was to evaluate the relationship between platelet-lymphocyte ratio (PLR) and first pass effect (FPE) in patients with acute ischemic stroke (AIS). Our secondary goal was to investigate other laboratory, demographic or technical parameters that may be related to FPE and to search for independent predictors of FPE. Materials and methods: Patients who underwent mechanical thrombectomy (MT) in our hospital between January 2017 and February 2020 were reviewed. Patients were divided into two groups: FPE and non-FPE. Demographic features, laboratory parameters, pretreatment imaging and clinical features, angiographic and clinical outcomes were recorded and compared between the two groups. Logistic regression analysis was performed to analyze the independent predictors and a predictive model was produced for demonstrating the possibility to achieve FPE. Results: The study consisted of 83 patients (37 female, 46 male; mean age 62.69 similar to 15.16) who were treated by MT. FPE was achieved in 32 patients (32/83, 38.6%). PLR was higher in the non-FPE group (195.35 similar to 101.49) when compared to the FPE group (103.17 similar to 37.06). A PLR value of <126.3 and female sex were found as independent predictors of FPE. Our predictive model estimated the chance of FPE as 77.9% in female patients who had PLR values lower than 126.3 while it was 77.1% when only using the PLR cutoff value. Conclusions: High levels of PLR were associated with the failure of FPE. High values of PLR may be considered as a negative predictor for FPE achievement prior to MT in patients with AIS

The role of CT texture analysis in predicting the clinical outcomes of acute ischemic stroke patients undergoing mechanical thrombectomy

Objectives To evaluate the performance of CT-based texture analysis (TA) for predicting clinical outcomes of mechanical thrombectomy (MT) in acute ischemic stroke (AIS). Methods This single-center, retrospective study contained 64 consecutive patients with AIS who underwent MT for large anterior circulation occlusion between December 2016 and January 2020. Patients were divided into 2 groups according to the modified Rankin scale (mRS) scores at 3 months as good outcome (mRS 2). Two observers examined the early ischemic changes for TA on baseline non-contrast CT images independently. Demographic, clinical, periprocedural, and texture variables were compared between the groups and ROC curves were made. Logistic regression analysis was used and a model was created to determine the independent predictors of a bad outcome. Results Sixty-four patients (32 female, 32 male; mean age 63.03 +/- 14.42) were included in the study. Fourteen texture parameters were significantly different between patients with good and bad outcomes. The long-run high gray-level emphasis (LRHGE), which is a gray-level run-length matrix (GLRLM) feature, showed the highest sensitivity (80%) and specificity (70%) rates to predict disability. The GLRLM_LRHGE value of > 4885.0 and the time from onset to puncture of > 237.5 mi were found as independent predictors of the bad outcome. The diagnostic rate was 80.0% when using the combination of the GLRLM_LRHGE and the time from onset to puncture cutoff values. Conclusion CT-based TA might be a promising modality to predict clinical outcome after MT in patients with AIS

Hyponatremic Encephalopathy After Excessive Water Ingestion Prior To Pelvic Ultrasound: Neuroimaging Findings

We report two patients with acute hyponatremic encephalopathy which developed after massive water ingestion for pelvic ultrasound and emphasize the findings of magnetic resonance (MR) imaging including diffusion-weighted imaging (DWI). Both subjects had completely recovered within 24 hours following fluid restriction and salt replacement. MR imaging revealed cortical sulcal narrowing, restricted diffusion and sulcal T2 hyperintensity along with diffuse pial enhancement suggesting diffuse cerebral cortical cytotoxic edema and blood-brain barrier breakdown. In addition to the first illustration of multimodality MR imaging features of water-intoxication, these two cases also highlight the need for standardized practice on the quantity of water intake recommended to distend the bladder for pelvic ultrasound, especially in patients at risk for serum inappropriate ADH syndrome-related hyponatremia.WoSScopu

İNME KLİNİK PRATİĞİNDE NOAK KULLANIMI:TÜRK BEYİN DAMAR HASTALIKLARI DERNEĞİ UZMAN GÖRÜŞÜ

Non-vitamin K oral antikoagülanların (NOAK) atrial fibrilasyonda inmenin önlenmesi amacıyla on yılı aşan bir süredirbaşarı ile kullanıldığı açıktır. Varfarine göre belirgin derecede az kanamaya yol açmaları ve inmeyi de eşit veya daha fazlaoranda önleyebilmeleri yanı sıra kolay kullanım özellikleri primer proflakside atrial fibrilasyona bağlı inmeyi azaltmakonusunda öne çıkmaktadır. Bunlar aynı zamanda genel inme prevalansının azalması anlamına gelmektedir. Yani AFnedenli inmenin engellenmesi toplum sağlığı için çağdaş bir gereklilik olarak algılanmalıdır. İnme klinik pratiğindekardiyoloji uzmanları ile birlikte bu bağlamda çaba sarf eden nöroloji uzmanları için Türk Beyin Damar HastalıklarıDerneği bu uzman görüşünü hazırladı. Görüşler NOAK grubu ilaçların kullanımında sıkça karşılaşılan sorunlar ve buproblemler için güncel çözüm önerilerini içermektedir.It is clear that nonvitamin K oral anticoagulants (NOACs) have been used successfully for more than ten years to preventstroke in atrial fibrillation. In addition to the fact that they cause significantly less bleeding compared to warfarin and canprevent stroke equally or more, their easy-to-use features stand out in reducing stroke due to atrial fibrillation in primaryprophylaxis. These also mean a decrease in the overall prevalence of stroke. For sure, prevention of AF-induced strokeshould be perceived as a contemporary requirement for public health. Turkish Society of Cerebrovascular Diseases hasprepared this expert opinion for neurologists who strive for this purpose together with cardiologists in the clinicalpractice of stroke. The article contains frequently encountered problems in the use of NOACs and current solutions forthese problems

Atrial Fibrillation Management in Acute Stroke Patients in Türkiye: Real-life Data from the NöroTek Study

Objective: Atrial fibrillation (AF) is the most common directly preventable cause of ischemic stroke. There is no dependable neurology-based data on the spectrum of stroke caused by AF in Turkiye. Within the scope of NoroTek-Turkiye (TR), hospital-based data on acute stroke patients with AF were collected to contribute to the creation of acute-stroke algorithms.Materials and Methods: On May 10, 2018 (World Stroke Awareness Day), 1,790 patients hospitalized at 87 neurology units in 30 health regions were prospectively evaluated. A total of 929 patients [859 acute ischemic stroke, 70 transient ischemic attack (TIA)] from this study were included in this analysis.Results: The rate of AF in patients hospitalized for ischemic stroke/TIA was 29.8%, of which 65% were known before stroke, 5% were paroxysmal, and 30% were diagnosed after hospital admission. The proportion of patients with AF who received "effective" treatment [international normalization ratio >= 2.0 warfarin or non-vitamin K antagonist oral anticoagulants (NOACs) at a guideline dose] was 25.3%, and, either no medication or only antiplatelet was used in 42.5% of the cases. The low dose rate was 50% in 42 patients who had a stroke while taking NOACs. Anticoagulant was prescribed to the patient at discharge at a rate of 94.6%; low molecular weight or unfractionated heparin was prescribed in 28.1%, warfarin in 32.5%, and NOACs in 31%. The dose was in the low category in 22% of the cases discharged with NOACs, and half of the cases, who received NOACs at admission, were discharged with the same drug.Conclusion: NoroTekTR revealed the high but expected frequency of AF in acute stroke in Turkiye, as well as the aspects that could be improved in the management of secondary prophylaxis. AF is found in approximately one-third of hospitalized acute stroke cases in Turkiye. Effective anticoagulant therapy was not used in three-quarters of acute stroke cases with known AF. In AF, heparin, warfarin, and NOACs are planned at a similar frequency (one-third) within the scope of stroke secondary prophylaxis, and the prescribed NOAC dose is subtherapeutic in a quarter of the cases. Non-medical and medical education appears necessary to prevent stroke caused by AF