Publications by authors named "Aikaterini Theodorou"

Cognitive impairment represents a core and prodromal clinical feature of cerebral amyloid angiopathy (CAA). We sought to assess specific cognitive domains which are mainly affected among patients with CAA and to investigate probable associations with neuroimaging markers and Cerebrospinal Fluid (CSF) biomarkers. Thirty-five patients fulfilling the Boston Criteria v1.

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  • Intracranial atherosclerotic disease (ICAD) is a major cause of ischemic stroke globally, with rising detection rates across various racial and ethnic groups, shifting our understanding of its epidemiology.
  • The disease is characterized by the buildup of plaques in major intracranial arteries, with diagnosis relying on the degree of luminal narrowing, which can now be detected earlier using advanced imaging techniques like high-resolution vessel wall MRI.
  • Recent studies show that while historically certain racial groups had higher ICAD prevalence, there is an increasing recognition of the condition among White patients, raising the need for tailored management strategies that address risk factors and emerging treatments.
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  • * A case study of a 66-year-old woman illustrates how subacute motor weakness and numbness followed a respiratory infection, highlighting the importance of her medical history, including diabetes and Sezary syndrome.
  • * The text stresses the need for thorough evaluations and awareness of clinical signs and tests in neuropathy cases, particularly for those with a history of blood-related cancers, as early treatment can significantly impact outcomes.
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  • The European Stroke Organisation recommends using tenecteplase (TNK) as an alternative to alteplase (TPA) for treating acute ischemic stroke within 4.5 hours, based on previous studies establishing its noninferiority.
  • An updated systematic review and meta-analysis assessed the efficacy and safety of TNK compared to TPA, using data from 11 randomized controlled trials involving nearly 7,600 patients.
  • Results showed that TNK was linked to better chances of achieving excellent functional outcomes and reduced disability at 3 months, while maintaining similar safety profiles for symptomatic intracranial hemorrhage when compared to TPA.
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  • GLP-1 receptor agonists (liraglutide, semaglutide, tirzepatide) may lower cardiovascular risk in overweight/obese individuals without diabetes.
  • A systematic review of 16 trials involving over 28,000 participants showed these medications reduced major adverse cardiovascular events and all-cause mortality compared to placebo.
  • While they significantly lowered the risk of myocardial infarction, the relationship with stroke is less clear due to limited data.
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  • A study evaluated the safety and efficacy of IV thrombolysis (IVT) for acute ischemic stroke (AIS) in patients who received dabigatran reversal with idarucizumab, as limited data exist on this topic.
  • Thirteen cohorts and one case series involving 553 patients were analyzed, revealing low rates of symptomatic intracranial hemorrhage (4%), any intracranial hemorrhage (10%), and 3-month mortality (18%).
  • Functional outcomes were promising, with 56% achieving excellent outcomes and 70% good outcomes at 3 months, with no significant differences observed between patients treated with idarucizumab and those without.
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Background And Purpose: Cervical artery dissection (CAD) represents a leading cause of unilateral lower cranial nerve IX-XII palsy, known as Collet-Sicard syndrome (CSS). High-resolution magnetic resonance imaging (HR-MRI) is widely used in the evaluation of patients with CAD, providing information regarding vessel wall abnormalities and intraluminal thrombus.

Methods: We present a patient with palsy of multiple lower cranial nerves in the context of CSS, attributed to unilateral spontaneous internal carotid artery dissection.

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  • - The study aimed to compare levels of cerebrospinal fluid (CSF) and plasma biomarkers associated with Cerebral Amyloid Angiopathy (CAA) against healthy controls and Alzheimer’s Disease patients.
  • - A meta-analysis of nine cohorts revealed significant differences in CSF levels of β-amyloids and tau proteins, with CAA patients showing lower Aβ42 and Aβ40 levels compared to healthy controls and distinct tau levels compared to both groups.
  • - The findings suggest that specific biomarker profiles in CSF could help differentiate CAA from Alzheimer's and healthy individuals, while plasma biomarker levels did not show significant differences.
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Introduction: We aimed to investigate the performance of several neuroimaging markers provided by perfusion imaging of Acute Ischemic Stroke (AIS) patients with large vessel occlusion (LVO) in order to predict clinical outcomes following reperfusion treatments.

Methods: We prospectively evaluated consecutive AIS patients with LVO who were treated with reperfusion therapies, during a six-year period. In order to compare patients with good (mRS scores 0-2) and poor (mRS scores 3-6) functional outcomes, data regarding clinical characteristics, the Alberta Stroke Programme Early Computed Tomography Score (ASPECTS) based on unenhanced computed tomography (CT), CT angiography collateral status and perfusion parameters including ischemic core, hypoperfusion volume, mismatch volume between core and penumbra, Tmax > 10 s volume, CBV index and the Hypoperfusion Index Ratio (HIR) were assessed.

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Objectives: Cerebral venous thrombosis is an uncommon, yet life-threatening condition, affecting mainly young and middle-aged individuals. Moreover, it represents an underrecognised etiology of lobar intracerebral hemorrhage (ICH). The clinical course of CVT is variable in the first days after diagnosis and medical complications including pulmonary embolism (PE) may result in early neurological deterioration and death if left untreated.

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Introduction: Mounting evidence suggests that glucagon-like-peptide-1 receptor-agonists (GLP-1 RAs) attenuate cardiovascular-risk in type-2 diabetes (T2DM). Tirzepatide is the first-in-class, dual glucose-dependent-insulinotropic-polypeptide GIP/GLP-1 RA approved for T2DM.

Patients And Methods: A systematic review and meta-analysis of randomized-controlled clinical trials (RCTs) was performed to estimate: (i) the incidence of major adverse cardiovascular events (MACE); and (ii) incidence of stroke, fatal, and nonfatal stroke in T2DM-patients treated with GLP-1 or GIP/GLP-1 RAs (vs placebo).

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Background: Paraneoplastic Neurological Syndromes (PNS) comprise a diverse group of disorders propagated by immune-mediated effects of malignant tumors on neural tissue.

Methods: A single-center longitudinal study was performed including consecutive adult patients treated at a tertiary academic hospital between 2015 and 2023 and diagnosed with PNS. PNS were ascertained using the 2004 and the revised 2021 PNS-Care diagnostic criteria.

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Cardioembolic stroke is a major cause of morbidity, with a high risk of recurrence, and anticoagulation represents the mainstay of secondary stroke prevention in most patients. The implementation of endovascular treatment in routine clinical practice complicates the decision to initiate anticoagulation, especially in patients with early hemorrhagic transformation who are considered at higher risk of hematoma expansion. Late hemorrhagic transformation in the days and weeks following stroke remains a potentially serious complication for which we still do not have any established clinical or radiological prediction tools.

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Background: Outcome data regarding the administration of tenecteplase (TNK) to acute ischemic stroke (AIS) patients presenting in the extended time window are limited.

Objectives: We aimed to assess the current evidence regarding the efficacy and safety of TNK at a dose of 0.25 mg/kg for AIS treatment in the extended time window.

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Background: Atrial fibrillation (AF) is a frequent underlying cause of cryptogenic stroke (CS) and its detection can be increased using implantable cardiac monitoring (ICM). We sought to evaluate different risk scores and assess their diagnostic ability in identifying patients with CS with underlying AF on ICM.

Methods: Patients with CS, being admitted to a single tertiary stroke center between 2017 and 2022 and receiving ICM, were prospectively evaluated.

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Background And Purpose: Orolingual angioedema (OA) represents a rare but life-threatening complication among patients with acute ischemic stroke treated with intravenous thrombolysis with alteplase. Novel agents, including icatibant, are recommended in resistant patients with alteplase-induced OA who have failed to respond to first-line therapies including corticosteroids, antihistamines, and/or adrenaline.

Methods: We present a patient with alteplase-induced OA who showed substantial clinical improvement following the administration of icatibant.

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Background: Periodic Limb Movements during Sleep (PLMS) have been described to be frequently present in stroke patients. We aimed to evaluate the prevalence and severity of PLMS in acute stroke patients and clarify the association between PLMS and coexisting Sleep Disordered Breathing (SDB). Additionally, we focused on identifying variables that could independently predict the presence of PLMS in patients with acute stroke.

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Sporadic cerebral amyloid angiopathy (CAA) is a small vessel disease, resulting from progressive amyloid-β deposition in the media/adventitia of cortical and leptomeningeal arterioles. We sought to assess the prevalence of baseline characteristics, clinical and radiological findings, as well as outcomes among patients with CAA, in the largest study to date conducted in Greece. Sixty-eight patients fulfilling the Boston Criteria v1.

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Background And Purpose: Several risk factors of symptomatic intracerebral hemorrhage (SICH) following intravenous thrombolysis for acute ischaemic stroke have been established. However, potential predictors of good functional outcome post-SICH have been less studied.

Methods: Patient data registered in the Safe Implementation of Treatment in Stroke-International Stroke Thrombolysis Register (SITS-ISTR) from 2005 to 2021 were used.

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Background: Cerebral Amyloid Angiopathy-related inflammation (CAA-ri) is a distinct but rare subset of CAA. The greater availability of high resolution Magnetic Resonance Imaging (MRI) has currently allowed the increasing recognition and diagnosis of this entity, without the risk of a brain biopsy. However, in rare cases with typical clinical characteristics but uncommon neuroimaging findings at presentation, the brain-biopsy is required for an early and reliable diagnosis.

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Introduction: Establishment of a prospective stroke registry may promote the documentation and improvement of acute stroke care. We present the status of stroke management in Greece using the Registry of Stroke Care Quality (RES-Q) dataset.

Methods: Consecutive patients with acute stroke were prospectively registered in RES-Q registry by contributing sites in Greece during the years 2017-2021.

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Background: Sleep-disordered breathing (SDB) is common among acute stroke patients. We sought to investigate the prevalence, severity and type of SDB in consecutive acute stroke patients. Moreover, we aimed to identify independent predictors of SDB in the acute stroke setting and investigate potential associations between SDB and functional outcomes at three months.

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