Publications by authors named "Wieslaw Oczkowski"

Background For patients with atrial fibrillation seen in the emergency department (ED) following a transient ischemic attack (TIA) or minor stroke, the impact of initiating oral anticoagulation immediately rather than deferring the decision to outpatient follow-up is unknown. Methods and Results We conducted a planned secondary data analysis of a prospective cohort of 11 507 adults in 13 Canadian EDs between 2006 and 2018. Patients were eligible if they were aged 18 years or older, with a final diagnosis of TIA or minor stroke with previously documented or newly diagnosed atrial fibrillation.

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Article Synopsis
  • The study validates that certain CT findings in patients with transient ischemic attack (TIA) are linked to an increased risk of subsequent strokes.
  • Among the 8670 patients enrolled, 4547 showed signs of ischemia on CT, with a subsequent stroke rate of 3.8% within 90 days.
  • Specific combinations of acute and chronic ischemia or microangiopathy significantly raised the risk of stroke, especially shortly after the initial event.
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Objective: Stroke presenting as dizziness is a diagnostic challenge in frontline settings, given the multitude of benign conditions that present similarly. The risk of stroke after episodic dizziness is unknown, leading to divergent guidance on optimal workup and management. Prior TIA risk scores have shown a history of dizziness is a negative predictor of subsequent stroke.

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Background: Transient ischemic attack (TIA) and non-disabling stroke are common emergency department (ED) presentations. Currently, there are no prospective multicenter studies determining predictors of neurologists confirming a diagnosis of cerebral ischemia in patients discharged with a diagnosis of TIA or stroke. The objectives were to (1) calculate the concordance between emergency physicians and neurologists for the outcome of diagnosing TIA or stroke, and (2) identify characteristics associated with neurologists diagnosing a stroke mimic.

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Objective: To validate the previously derived Canadian TIA Score to stratify subsequent stroke risk in a new cohort of emergency department patients with transient ischaemic attack.

Design: Prospective cohort study.

Setting: 13 Canadian emergency departments over five years.

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Article Synopsis
  • The study examined how COVID-19 restrictions affected the treatment timelines for acute ischemic stroke patients in Central South Ontario.
  • Significant delays were noted in door-to-CT and door-to-needle times for patients receiving tPA or EVT after the restrictions were imposed.
  • Despite the delays in treatment metrics, there were no increases in the time from symptom onset to hospital arrival during the initial months of the restrictions.
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To establish proof-of-concept of a novel rehabilitation self-management program that aims to optimize walking recovery after stroke through engaging patients in independent walking-related practice outside of supervised physiotherapy sessions. The Independent Mobility-related Physical ACTivity (IMPACT) Program is a coach-supported intervention that uses self-management strategies to empower patients to engage in additional autonomous walking-related activities after stroke during and after inpatient rehabilitation. The aim of this study was to assess whether implementation of this intervention would be associated with targeted patient behaviors; goal setting, negotiation and completion of a walking-related practice plan outside of formal therapy sessions.

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Background: Atraumatic needles have been proposed to lower complication rates after lumbar puncture. However, several surveys indicate that clinical adoption of these needles remains poor. We did a systematic review and meta-analysis to compare patient outcomes after lumbar puncture with atraumatic needles and conventional needles.

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Article Synopsis
  • Lumbar puncture is a common medical procedure that can lead to complications like headaches, which can cause significant discomfort and require intense pain relief or other treatments.
  • The study aims to review the effectiveness of atraumatic needles, which are believed to reduce the incidence of headaches compared to traditional bevelled needles, and to evaluate various clinical outcomes associated with both types.
  • The research will involve analyzing published studies and using specific quality assessment tools to measure outcomes such as headache frequency, intensity, treatment, and other related symptoms.
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Background And Purpose: Ischemia on computed tomography (CT) is associated with subsequent stroke after transient ischemic attack. This study assessed CT findings of acute ischemia, chronic ischemia, or microangiopathy for predicting subsequent stroke after transient ischemic attack.

Methods: This prospective cohort study enrolled patients with transient ischemic attack or nondisabling stroke that had CT scanning within 24 hours.

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Background: Isolated dysarthria is an uncommon presentation of transient ischemic attack (TIA)/minor stroke and has a broad differential diagnosis. There is little information in the literature about how often this presentation is confirmed to be a TIA/stroke, and therefore there is debate about the risk of subsequent vascular events. Given the uncertain prognosis, it is unclear how to best manage patients presenting to the emergency department (ED) with isolated dysarthria.

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Background And Purpose: The occurrence of a transient ischemic attack (TIA) increases an individual's risk for subsequent stroke. The objectives of this study were to determine clinical features of patients with TIA associated with impending (≤7 days) stroke and to develop a clinical prediction score for impending stroke.

Methods: We conducted a prospective cohort study at 8 Canadian emergency departments for 5 years.

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Stroke is the most common serious neurological disorder. To date, the focus for research and trials has been on prevention and acute care. Many patients are left with serious neurological impairments and limitations in activity and participation after stroke.

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Background: Screening for cognitive impairment is recommended in patients with cerebrovascular disease. We sought to establish the incidence of cognitive impairment using the Montreal Cognitive Assessment (MoCA) in a cohort of consecutive patients attending our stroke prevention clinic (SPC), and to determine whether a subset of the MoCA could be derived for use in this busy clinical setting.

Methods: The MoCA was administered to 102 patients.

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Background: The dose of intravenous tissue plasminogen activator (tPA) administered in acute ischemic stroke patients is calculated using the patient's weight (0.9 mg/kg). Patients are rarely weighed before treatment in actual practice, although overestimating patient weights leads to higher doses of tPA, which may adversely influence outcome.

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The introduction of thrombolytic therapy has revolutionized the management of acute ischemic stroke, and it has now been conclusively established that tissue plasminogen activator (t-PA) given within 4.5 hours of stroke onset both limits irreversible ischemic neuronal damage by establishing reperfusion of the penumbra and improves outcomes for patients who have undergone stroke. As a regional stroke centre, Hamilton Health Services (HHS) seeks to ensure it meets guidelines and readiness criteria in acute stroke care.

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