Publications by authors named "Amy Guzik"

Objective: Stroke patients with large core infarctions benefit from endovascular intervention, though only approximately 20% are functionally independent at 90 days. We studied prognostic factors for patients presenting with a large computed tomography perfusion (CTP) core.

Methods: Retrospective analysis from a health system stroke registry, including consecutive thrombectomy patients treated within 24 hours from August 2020-December 2022 with an anterior circulation large vessel occlusion and CTP core infarct ≥50 milliliters.

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Telemedicine for stroke (Telestroke) has been a key component to efficient, widespread acute stroke care for many years. The expansion of reimbursement through the Furthering Access to Stroke Telemedicine Act and rapid deployment of telemedicine resources during the COVID-19 public health emergency have further expanded remote care, with practitioners of varying educational backgrounds, and experience providing acute stroke care via telemedicine (Telestroke). Some Telestroke practitioners have not had fellowship-level vascular neurology training and many are without training specific to virtual modalities.

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Introduction: Previously published data are conflicting regarding the ability of tenecteplase versus alteplase to produce early recanalization of an intracranial large vessel occlusion. We compared the performance of each thrombolytic in a stroke network.

Methods: We queried our prospectively collected code stroke registry for basilar, internal carotid, or proximal middle cerebral artery occlusion patients treated with intravenous thrombolysis from 11/17/2021-9/16/2023.

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Background: The DEFUSE 3 and SELECT2 thrombectomy trials included some patients with similar radiographic profiles, although the rates of good functional outcomes differed widely between the studies.

Objective: To report neurological outcomes for patients who meet CT and CT perfusion (CTP) inclusion criteria common to both DEFUSE 3 and SELECT2.

Methods: Retrospective study of thrombectomy patients, presenting between November 2016 and December 2023 to a large health system, with Alberta Stroke Program Early CT score ≥6, core infarction 50-69 mL, mismatch ratio ≥1.

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Background: Basilar thrombosis frequently leads to poor functional outcomes, even with good endovascular reperfusion. We studied factors associated with severe disability or death in basilar thrombectomy patients achieving revascularization.

Methods: We retrospectively analyzed records from a health system's code stroke registry, including successful basilar thrombectomy patients from January 2017 to May 2023 who were evaluated with pretreatment computed tomography perfusion.

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Background And Purpose: Predicting functional outcomes after endovascular thrombectomy (EVT) is of interest to patients and families as they navigate hospital and post-acute care decision-making. We evaluated the prognostic ability of several scales to predict good neurological function after EVT.

Methods: We retrospectively analyzed records from a health system's code stroke registry, including consecutive successful thrombectomy patients from August 2020 to February 2023 presenting with an anterior circulation large vessel occlusion who were evaluated with pre-EVT CT perfusion.

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Background: Patients presenting with large core infarctions benefit from treatment with endovascular thrombectomy (EVT), with a notable 50% reduction in rates of severe disability (modified Rankin Scale [mRS] 5) at 90 days. We studied the ability of previously reported prognostic scales to predict devastating outcomes in patients with a large ischemic core and limited salvageable brain tissue.

Methods: Retrospective analysis from a health system's code stroke registry, including consecutive thrombectomy patients from November 2017 to December 2022 with an anterior circulation large vessel occlusion, computed tomography perfusion core infarct ≥ 50 ml, and mismatch volume < 15 ml or mismatch ratio < 1.

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Introduction: The Critical Area Perfusion Score (CAPS) predicts functional outcomes in vertebrobasilar thrombectomy patients based on computed tomography perfusion (CTP) hypoperfusion. We compared CAPS to the clinical-radiographic Charlotte Large artery occlusion Endovascular therapy Outcome Score (CLEOS).

Methods: Acute basilar thrombosis patients from January 2017-December 2021 were included in this retrospective analysis from a health system's stroke registry.

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Telehealth has seen rapid expansion into chronic care management in the past 3 years because of the COVID-19 pandemic. Telehealth for acute care management has expanded access to equitable stroke care to many patients over the past two decades, but there is limited evidence for its benefit for addressing disparities in the chronic care of patients living with stroke. In this review, we discuss advantages and disadvantages of telehealth use for the outpatient management of stroke survivors.

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Background And Objectives: Declines in stroke admission, IV thrombolysis (IVT), and mechanical thrombectomy volumes were reported during the first wave of the COVID-19 pandemic. There is a paucity of data on the longer-term effect of the pandemic on stroke volumes over the course of a year and through the second wave of the pandemic. We sought to measure the effect of the COVID-19 pandemic on the volumes of stroke admissions, intracranial hemorrhage (ICH), IVT, and mechanical thrombectomy over a 1-year period at the onset of the pandemic (March 1, 2020, to February 28, 2021) compared with the immediately preceding year (March 1, 2019, to February 29, 2020).

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Article Synopsis
  • A novel inpatient teleneurology consultation service was implemented at an academic medical center, where patient feedback, as well as input from ordering providers and consulting neurologists, was collected to evaluate the service's effectiveness.
  • A telephone survey of 25 patients revealed that 72% felt they gained a better understanding of their condition, and many appreciated being able to stay close to home.
  • Both ordering providers and consulting neurologists expressed high satisfaction with the service, noting its value in patient care, with a majority indicating they would use it again, while concerns about missed diagnoses were lower among neurologists compared to providers.
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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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Objective: To identify factors that patients consider when choosing between future in-person, video, or telephone visits.

Background: Telemedicine has been rapidly integrated into ambulatory neurology in response to the COVID-19 pandemic.

Methods: Ambulatory neurology patients at a single center were contacted via telephone to complete: (1) a survey quantifying likelihood of scheduling a future telemedicine visit, and (2) a semi-structured qualitative interview following their visit in March 2021.

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Objective: To assess patient experiences with rapid implementation of ambulatory telehealth during the coronavirus disease 2019 (COVID-19) pandemic.

Methods: A mixed-methods study was performed to characterize the patients' experience with neurology telehealth visits during the first 8 weeks of the COVID-19 response. Consecutive patients who completed a telehealth visit were contacted by telephone.

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Objective: To describe rapid implementation of telehealth during the COVID-19 pandemic and assess for disparities in video visit implementation in the Appalachian region of the United States.

Methods: A retrospective cohort of consecutive patients seen in the first 4 weeks of telehealth implementation was identified from the Neurology Ambulatory Practice at a large academic medical center. Telehealth visits defaulted to video, and when unable, phone-only visits were scheduled.

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While use of telemedicine to guide emergent treatment of ischemic stroke is well established, the COVID-19 pandemic motivated the rapid expansion of care via telemedicine to provide consistent care while reducing patient and provider exposure and preserving personal protective equipment. Temporary changes in re-imbursement, inclusion of home office and patient home environments, and increased access to telehealth technologies by patients, health care staff and health care facilities were key to provide an environment for creative and consistent high-quality stroke care. The continuum of care via telestroke has broadened to include prehospital, inter-facility and intra-facility hospital-based services, stroke telerehabilitation, and ambulatory telestroke.

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Objective: Although many emergency departments (EDs) have telestroke capacity, it is unclear why some EDs consistently use telestroke and others do not. We compared the characteristics and practices of EDs with robust and low assimilation of telestroke.

Methods: We conducted semi-structured interviews with representatives of EDs that received telestroke services from 10 different networks and had used telestroke for a minimum of two years.

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Background And Objectives: Stroke is a chronic, complex condition that disproportionally affects older adults. Health systems are evaluating innovative transitional care (TC) models to improve outcomes in these patients. The Comprehensive Post-Acute Stroke Services (COMPASS) Study, a large cluster-randomized pragmatic trial, tested a TC model for patients with stroke or transient ischemic attack discharged home from the hospital.

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Objective: To highlight the importance of a broad differential and histopathologic confirmation in patients with newly diagnosed cancer with brain lesions atypical for CNS metastasis.

Methods: We report 2 cases of biopsy-proven CNS vasculitis in patients undergoing treatment for a newly diagnosed nonmetastatic cancer. Comprehensive medical record review was performed to identify the clinical presentation, representative neuroimaging, histopathologic features, and response to treatment.

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Purpose Of Review: Death from stroke has decreased over the past decade, with stroke now the fifth leading cause of death in the United States. In addition, the incidence of new and recurrent stroke is declining, likely because of the increased use of specific prevention medications, such as statins and antihypertensives. Despite these positive trends in incidence and mortality, many strokes remain preventable.

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Background: The indications and contraindications for intravenous (IV) recombinant tissue plasminogen activator (rtPA) use in ischemic stroke can be confusing to the practicing neurologist. Here we seek to describe practice patterns regarding decision-making among US stroke clinicians.

Methods: Stroke clinicians (attending and fellow) from the 8 National Institutes of Health SPOTRIAS (Specialized Programs of Translational Research in Acute Stroke) centers were asked to complete a survey ahead of the 2012 SPOTRIAS Investigators' meeting.

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Background: Treating acute ischemic stroke (AIS) within 4.5 hours and door-to-needle time of less than 60 minutes may optimize recovery. It is unknown if onset to Primary Stroke Center (PSC) time goals affect outcome.

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Background And Purpose: The objective of this pooled analysis was to determine the level of agreement between central read and each of 2 groups (spoke radiologists and hub vascular neurologists) in interpreting head computed tomography (CT) scans of stroke patients presenting to telestroke network hospitals.

Methods: The Stroke Team Remote Evaluation Using a Digital Observation Camera (STRokE DOC and STRokE DOC-AZ TIME) trials were prospective, randomized, and outcome blinded comparing telemedicine and teleradiology with telephone-only consultations. In each trial, the CT scans of the subjects were interpreted by the hub vascular neurologist in the telemedicine arm and by the spoke radiologist in the telephone arm.

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