Publications by authors named "Toshiyuki Uehara"

Objective: The purpose of this study was to determine whether increased alkaline phosphatase (ALP) was associated with early neurological deterioration (END) in patients with atherothrombotic brain infarction (ATBI) attributable to intracranial atherosclerosis (ICAS) or not.

Methods: We analyzed data derived from 70 patients (47 men; mean age, 72.4 ± 12.

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  • A study in Japan aimed to investigate the early stroke risk in patients with small vessel occlusion-transient ischemic attack (TIA) and compare it with other causes of TIA.
  • It analyzed data from 1320 TIA patients, finding that those with small vessel occlusion had the highest rate of recurrent strokes at 7.8% within 30 days.
  • The research concluded that small vessel occlusion TIA significantly increases the risk of early stroke, especially when associated with acute small deep infarcts.
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A 48-year-old man with rapid onset of fever elevation developed acute myelitis over a period of a week. MRI of the spinal cord revealed a longitudinal T-hyperintense intraspinal lesion extending from C6 to Th8 level. Clinical symptoms and findings resolved with immunotherapy.

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Background: Time and resource limitations prevent cognitive assessment in acute-to-subacute settings, even in comprehensive stroke centers.

Objective: To assess cognitive function in acute stroke patients undergoing routine clinical, laboratory, and radiological investigations, with a view to improving post-stroke care and treatment.

Methods: Sixty-nine patients (72.

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  • - A healthy 16-year-old male initially experienced gastrointestinal symptoms, followed by severe neurological issues, including fever and loss of consciousness, leading to a comatose state.
  • - Treatment involving steroids, plasma exchange, and immunoglobulins resulted in symptom resolution, but the patient also exhibited new symptoms like ophthalmoplegia and ataxia during recovery.
  • - The diagnosis of Bickerstaff's brainstem encephalitis (BBE) was confirmed through the presence of specific autoantibodies and brain imaging that showed temporary dysfunction in the brainstem and cerebellar cortex.
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Background and Purpose- Patients with transient ischemic attack (TIA) occasionally show nonfocal symptoms, such as unconsciousness, amnesia, and unsteadiness. The purpose of this study was to clarify the characteristics and prognosis of patients with TIA with nonfocal symptoms, using data from the PROMISE-TIA (Prospective Multicenter Registry to Identify Subsequent Cardiovascular Events After Transient Ischemic Attack). Methods- Patients with TIA within 7 days of onset were consecutively enrolled in the Japanese nationwide registry.

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Background: A transient visual symptom (TVS) is a clinical manifestation of transient ischemic attack (TIA). The aim of this study was to investigate differences in clinical characteristics among subtypes of TVS using multicenter TIA registry data.

Materials And Methods: Patients with TIA visiting within 7 days of onset were prospectively enrolled from 57 hospitals between June 2011 and December 2013.

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Objective The purpose of this study was to identify the predictors of subsequent ischemic stroke events in patients with transient ischemic attack (TIA) attributable to intracranial arterial occlusive lesions. Methods The study population included 82 patients (55 men; mean age, 69.3±12.

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  • C-Pittsburgh compound-B (C-PIB) PET imaging helps visualize amyloid accumulation in the brain, especially in conditions like Alzheimer's disease, but its significance in white matter (WM) remains unclear.
  • The study examined 21 patients with hypertensive small vessel disease to explore how the volume of white matter lesions (WMLs) relates to C-PIB binding potential (BP) in various brain regions.
  • Results showed that WML volume negatively correlates with BP in normal-appearing white matter (NAWM), indicating that C-PIB could serve as a potential marker for assessing brain health in relation to WMLs.
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The aim of this study was to determine whether pulse wave velocity (PWV), a marker of vascular endothelial impairment and arteriosclerosis, predicts future ischemic stroke in patients who developed acute lacunar infarction. Patients with a first-ever ischemic stroke due to acute lacunar infarction were enrolled in this study. An oscillometric device (Form PWV/ABI; Omron Colin, Tokyo, Japan) was used to measure brachial-ankle PWV 1 week after stroke onset.

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Background Incidence and predictors of ischemic stroke in patients with transient ischemic attack (TIA) have not been fully clarified outside Europe and North America. Aims We undertook the present prospective, multicenter study to clarify the incidence, predictors, and etiology of ischemic stroke within one year of TIA onset in Japan. Methods The study subjects were patients within seven days of TIA onset who were enrolled in a prospective register from 57 hospitals between June 2011 and December 2013.

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Background: Symptoms of transient ischemic attack (TIA) persist on arrival and subsequently resolve in some patients admitted to hospitals early after onset. Differences in clinical characteristics between patients with acute TIA whose symptoms do and do not persist on arrival remain unclear.

Methods: We retrospectively extracted data of consecutive TIA patients with an onset-to-door time (ODT) of 24 hours or less and without a history of stroke from a multicenter TIA database.

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Objective: Cerebral microbleeds (CMBs), probably reflecting microangiopathy, have not yet sufficiently been examined in association with cerebral blood flow (CBF) and metabolism. We investigated the relationships between CMBs, and CBF and metabolism in symptomatic small vessel disease.

Methods: We enrolled 22 patients with symptomatic small vessel disease without severe stenosis (>50 %) in major cerebral arteries.

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Background/aims: The aims of this study were to determine the differences in clinical characteristics and the risk of ischemic stroke between patients with transient ischemic attack (TIA) attributable to extracranial carotid and intracranial artery occlusive lesions.

Methods: Among 445 patients admitted to our stroke care unit within 48 h of TIA onset between April 2008 and December 2013, 85 patients (63 men, mean age 69.4 years) with large artery occlusive lesions relevant to symptoms were included in this study.

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Background: Atrial fibrillation (AF) is an important risk factor for transient ischemic attack (TIA). However, little is known about the characteristics of TIA patients with AF. This study investigated the characteristics of such patients, using data from a retrospective, observational, multicenter study.

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Background: Patients with transient ischemic attack (TIA) without large-artery disease (LAD) or atrial fibrillation (AF) on admission may be at higher risk of stroke than previously thought. The aim of this study was to investigate early stroke risk and its predictors in such patients.

Methods: We studied 410 TIA patients admitted to our institute within 48 hours of onset.

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Background: We conducted a survey by questionnaire to identify the essential components of stroke centers in Japan and compared our results with the European Expert Survey.

Methods: In 2007, a questionnaire was mailed to the directors of 740 facilities certified by the Japan Stroke Society to ask their opinion on the essential components of comprehensive stroke centers (CSC), primary stroke centers (PSC) and any hospital ward (AHW) admitting acute stroke patients. The directors were asked to provide 1 of the following 6 possible answers regarding 112 components: 'irrelevant'; 'useful but not necessary'; 'desirable'; 'important but not absolutely necessary'; 'absolutely necessary', or 'question unclear or ambiguous'.

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Objectives: The purpose of this study was to elucidate the factors that correlate with unfavorable outcomes and to develop a simple validated model for assessing risk of unfavorable outcomes in patients with minor ischemic stroke.

Methods: The derivation cohort included 1,313 patients hospitalized within 72 hours after onset with an initial NIH Stroke Scale score of 0 to 3 enrolled in a prospective, multicenter, observational study. Unfavorable outcome was defined as dependency (modified Rankin Scale score of 3-5) or death at 90 days.

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Background: The purpose of this study was to elucidate the incidence and predictors of ischemic stroke or recurrent transient ischemic attack (TIA) during acute hospitalization in patients with TIA.

Methods: We carried out a multicenter retrospective study to clarify the characteristics of in-patients with TIA. The subjects of this study were TIA patients admitted to 13 stroke hospitals within 7 days after onset between 2008 and 2009.

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A 63-year-old patient with the right supplementary motor area infarct developed early-onset dystonia in the left upper extremity. The mechanisms involved in the genesis of focal dystonia are discussed with emphasis on cortical basal ganglia circuit and efferent projections from the supplementary motor area.

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Background And Purpose: The aim of this study was to elucidate the factors associated with the time from symptom onset to arrival at a stroke center (onset-to-door time [ODT]) in patients with classically defined transient ischemic attack using data from a multicenter, retrospective study.

Methods: The subjects were patients with transient ischemic attack admitted to 13 stroke centers in Japan within 7 days of onset between 2008 and 2009. A total of 464 patients registered (292 men, 68.

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