Publications by authors named "Atilla O Ozdemir"

The prognostic value of the neutrophil-lymphocyte ratio (NLR) in ischemic stroke remains debated due to cohort variability and treatment heterogeneity across studies. This study evaluates the relationship between admission NLR, stroke severity and 90-day outcomes in patients with anterior circulation large vessel occlusion (LVO) undergoing early, successful revascularization. A retrospective multicenter study was conducted with 1082 patients treated with mechanical thrombectomy for acute ischemic stroke.

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The postpartum period is a well-defined risk factor for cerebral venous sinus thrombosis (CVST). However, it is unclear which patients are at risk for CVST in the postpartum period. Thus, determining some CVST risk factors in postpartum patients may be useful for preventing the disorder in this population.

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Introduction: The adequacy of blood flow from the leptomeningeal collaterals is considered one of the most important factors determining the rate of infarct progression and response to acute stroke treatments in the setting of large vessel occlusions. Several patient-related variables, including age, vascular risk factors, and laboratory parameters, have been proposed to explain the interindividual variability of collateral flow among stroke patients. This study aimed to assess how pre-stroke frailty, an aging-related syndrome characterized by a loss in the physiologic reserve of numerous body functions, affected the degree of leptomeningeal collateral flow in the setting of acute ischemic stroke.

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Introduction: Ischemic cerebrovascular disease (ICVD) is a serious health problem in which brain tissue suffers from hypoxic damage due to obstruction in cerebral vessels. Mechanical thrombectomy is a commonly used method in the treatment of these patients. However, the effects of local anesthesia (LA) and conscious sedation (CS) during thrombectomy are still unclear.

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Introduction: While the Thrombite device differs from the Solitare stent with its Helical open-side structure feature, it shows great similarity with its other features. We assessed the Thrombite device's effectiveness and safety in this study.

Materials And Methods: The study was a retrospective analysis of patients who were included in the Turkish Interventional Neurology database and who had mechanical thrombectomy with the Thrombite device as the first choice between January 2020 and January 2023.

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Background: The issue of sex differences in stroke has gained concern in the past few years. However, multicenter studies are still required in this field. This study explores sex variation in a large number of patients and compares stroke characteristics among women in different age groups and across different countries.

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Introduction: C-reactive protein (CRP) and albumin are markers synthesized by the liver and may reflect inflammatory responses. CRP/Albumin ratio (CAR) serves better to reflect the inflammatory state and therefore the prognosis. Worse prognosis is reported in previous studies when CAR rate on admission is high in patients with stroke, aneurysmal subarachnoid hemorrhage, malignancy or patients followed in intensive care units.

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In Turkey, the incidence of acute stroke is increasing, obviously with the contribution of the aging population. With the publication of "Directive on Health Services to be Provided to Patients with Acute Stroke" on July 18, 2019 and its entry into force in March 2021, an important period of catching up and updating has begun in the management of acute stroke patients in our country. During this period, 57 comprehensive stroke centers and 51 primary stroke centers were certified.

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Background: Acute stroke care is complex and requires multidisciplinary networking. There are insufficient data on stroke care in the Middle East and adjacent regions in Asia and Africa.

Objective: Evaluate the state of readiness of stroke programs in the Middle East North Africa and surrounding regions (MENA+) to treat acute stroke.

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Background: Non-invasive vagus nerve stimulation (nVNS) using a hand-held stimulator placed on the neck is an FDA-approved treatment for primary headache disorders. The safety of nVNS is unknown in stroke patients.

Objective: To assess the safety and feasibility of nVNS for the acute treatment of stroke.

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Considering the aging population, the increase in predisposing factors, and the improvement in healthcare with increased survival rates, atrial fibrillation has been the most common cardiac arrhythmia in adults with a rise in the estimated lifetime risk over recent years. While aging is a powerful risk factor for atrial fibrillation, the leading prevalent comorbidities are hypertension, heart failure, obesity, obstructive sleep apnea, diabetes mellitus, and chronic kidney disease. Atrial fibrillation is associated with substantial morbidity, impaired quality of life, and increased mortality and healthcare costs.

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Objectives: This study aims to evaluate whether the presence of an external carotid artery embolism accompanying internal carotid artery occlusion may contribute to identifying the etiology of internal carotid artery occlusion in the early period.

Material And Methods: The presence of external carotid artery embolism was evaluated in 117 patients who were adjudicated for internal carotid artery occlusion based on digital subtraction angiography images.

Results: Embolus in the external carotid artery was detected in 8 (6.

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Objective: To determine clinical progression rates in patients with medulla oblongata infarction (MOI).

Materials And Methods: The data of patients diagnosed with MOI were analysed retrospectively. Dermographic characteristics of the patients; Age, gender, history and stroke etiology were evaluated.

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Article Synopsis
  • Recent studies showed a rise in cerebral venous thrombosis (CVT) cases during the COVID-19 pandemic, prompting this evaluation of hospitalization and mortality rates comparing the pandemic year (2020) to the year prior (2019).
  • A cross-sectional study analyzed data from 171 stroke centers worldwide, focusing on CVT admissions and associated mortality from January 2019 to May 2021, revealing no significant differences in overall CVT volume or mortality between 2019 and 2020.
  • However, the first five months of 2021 saw a notable increase in CVT admissions compared to 2019 and 2020, with higher mortality rates linked to COVID-19-positive patients and instances of vaccine-induced immune
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We evaluated the predictive factors of symptomatic intracranial hemorrhage (SICH) in endovascular treatment of stroke. We included 975 ischemic stroke patients with anterior circulation occlusion. Patients that had hemorrhage and an increase of ≥4 points in their National Institutes of Health Stroke Scale (NIHSS) after the treatment were considered as SICH.

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Background: COVID-19 pandemic has negatively impacted stroke care services at multiple levels. There was a decline in acute stroke admissions. Fewer interventions have been performed.

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Objective: The study aimed to evaluate the prognostic role of modified TAN collateral score in predicting functional independence in ischemic stroke patients, who underwent endovascular therapy.

Introduction: Identifying the group of patients, who will benefit most from arterial recanalization in patients with acute ischemic stroke, is the basis of success. Collateral circulation is a physiological condition that protects the brain against ischemia and inhibits the growth of a damaged area.

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Introduction: We aimed to predict intracranial pressure(ICP)after cerebral ischemic stroke by measuring diameter of the optic nerve sheath(ONSD)with bedside ultrasonography(US). In order to see the ICP changes,it was planned to record delta ICP changes at the 3rd and 5th day follow-up of the patients METHOTS: Patients aged 18 years or older who were admitted to the emergency department(ED)with stroke symptoms for one year were included.Demographic data,time elapsed since the onset of symptoms,neurogical status assesment scales,ONSD values measured by US in three time periods(the day the patient was admitted to the ED,the 3rd and 5th days of hospitalization),MDCT findings when the patient was admitted,ONSD values in MDCT,whether they received tissue plasminogen activator(tPA)and whether they underwent decompression surgery were recorded.

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Background: Unenhanced computed tomography (CT) is a frequently used imaging method in patients who are evaluated in the emergency department with suspected cerebral vein thrombosis (CVT).

Objectives: The aim of this study was to investigate the usefulness of the Hounsfield unit (HU) value determined by CT and its ratio to the patient's hematocrit (Htc) value in the diagnosis of cerebral vein thrombosis.

Methods: This retrospective study evaluated 41 patients with acute cerebral venous sinus thrombosis and 41 age- and sex-matched control participants.

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Background: During the COVID-19 pandemic, decreased volumes of stroke admissions and mechanical thrombectomy were reported. The study's objective was to examine whether subarachnoid haemorrhage (SAH) hospitalisations and ruptured aneurysm coiling interventions demonstrated similar declines.

Methods: We conducted a cross-sectional, retrospective, observational study across 6 continents, 37 countries and 140 comprehensive stroke centres.

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Objective: To measure the global impact of COVID-19 pandemic on volumes of IV thrombolysis (IVT), IVT transfers, and stroke hospitalizations over 4 months at the height of the pandemic (March 1 to June 30, 2020) compared with 2 control 4-month periods.

Methods: We conducted a cross-sectional, observational, retrospective study across 6 continents, 70 countries, and 457 stroke centers. Diagnoses were identified by their ICD-10 codes or classifications in stroke databases.

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Background: The COVID-19 pandemic led to profound changes in the organization of health care systems worldwide.

Aims: We sought to measure the global impact of the COVID-19 pandemic on the volumes for mechanical thrombectomy, stroke, and intracranial hemorrhage hospitalizations over a three-month period at the height of the pandemic (1 March-31 May 2020) compared with two control three-month periods (immediately preceding and one year prior).

Methods: Retrospective, observational, international study, across 6 continents, 40 countries, and 187 comprehensive stroke centers.

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Purpose: Red blood cell distribution width (RDW) evaluates the variation (size heterogeneity) in red blood cells. Elevated RDW has been identified as a predictor of poor functional outcomes for acute ischemic stroke. The association between elevated RDW level and poor functional outcome in stroke patients undergoing mechanical thrombectomy has not been reported before.

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