Publications by authors named "Havenon A"

Background: Elevated low-density lipoprotein cholesterol is a risk factor for atherosclerotic cardiovascular disease, including acute ischemic stroke (AIS), due to large- and small-vessel disease. Cholesterol management guidelines recommend lipid-lowering therapy (LLT) to prevent atherosclerotic cardiovascular disease events. This study assessed use of LLT at the time of AIS according to guideline recommendations and determined the association of prestroke LLT use with stroke severity.

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Introduction: Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) have demonstrated cardiovascular benefits in trials involving high-risk patients with type 2 diabetes (T2D), while dipeptidyl peptidase 4 inhibitors (DPP-4is) have not. However, DPP-4is are still commonly prescribed in patients with T2D and atherosclerotic cardiovascular disease (ASCVD). This study compared time to occurrence of cardiovascular events, health care resource utilization (HCRU), and medical costs in patients with T2D and ASCVD who initiated once-weekly semaglutide vs a DPP-4i.

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Background And Objectives: The neurologic examination is a key part of neurologist visits. The neurologic examination leads to more accurate diagnoses, avoidance of unnecessary tests and procedures, and a stronger doctor-patient relationship. However, the neurologic examination takes time to perform, leading to longer visits with neurologists than with other specialists.

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  • This review discusses the advancements in low-field magnetic resonance imaging (LF-MRI) as a tool for diagnosing and monitoring cerebrovascular diseases such as strokes and white matter hyperintensities.
  • Recent findings show that LF-MRI is beneficial due to its cost-effectiveness and versatility, making it suitable for various acute settings including emergency care and monitoring of chronic conditions.
  • The review highlights the potential of LF-MRI technology to improve patient management by providing reliable neuroimaging options that are accessible across different healthcare environments.
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  • Portable low-field magnetic resonance imaging (LF-MRI) offers a promising way to assess Alzheimer's disease (AD) patients in places where traditional MRI isn't available, despite some limitations in image quality.
  • * Researchers optimized LF-MRI techniques and created a free machine learning tool for analyzing brain structure and white matter changes in patients with cognitive impairments.
  • * The study found that LF-MRI accurately measures hippocampal volumes and white matter hyperintensities, suggesting that this technology can improve access to neuroimaging for dementia patients at a lower cost.
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Background: Underlying intracranial stenosis is the most common cause of failed mechanical thrombectomy in acute ischemic stroke patients with large vessel occlusion. Adjunct emergent stenting is sometimes performed to improve or maintain reperfusion, despite limited data regarding its safety or efficacy.

Methods: We conducted a prospective multicenter observational international cohort study.

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Background: The incidental discovery of previously unknown strokes on neuroimaging is an opportunity to implement secondary prevention, reducing the risk of recurrent strokes by up to 80%.

Objective: To evaluate the prevalence of previously unknown strokes on emergency department (ED) head CT imaging and identify associated patient and imaging factors.

Methods: Retrospective study of adult patients receiving head CT (age ≥ 18 years) at three EDs between July and December 2023.

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Background: Epilepsy is highly heritable, with numerous known genetic risk loci. However, the genetic predisposition's role in poststroke epilepsy (PSE) remains understudied. This study assesses whether a higher genetic predisposition to epilepsy raises poststroke survivor's risk of PSE.

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Article Synopsis
  • - The study analyzed individual patient data from multiple trials to assess sex-specific differences in clinical characteristics and outcomes of patients with spontaneous intracerebral hemorrhage (ICH).
  • - Results showed that while males were younger and had larger brain bleeds and a higher risk of bleed expansion compared to females, they also had a lower risk of poor functional outcomes.
  • - The findings indicate distinct biological and clinical pathways in males and females with ICH, emphasizing the need for targeted research based on sex differences in this condition.
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Background And Objectives: Mounting evidence points to a strong connection between cardiovascular risk during middle age and brain health later in life. The American Heart Association's Life's Essential 8 (LE8) constitutes a research and public health construct capturing key determinants of cardiovascular health. However, the overall effect of the LE8 on global, clinically relevant metrics of brain health is still unknown.

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Introduction: Migraine is an established risk factor for cerebral ischemic stroke, with an especially robust association in patients with migraine with aura. However, it is not known if migraine is a risk factor for retinal stroke (central or branch retinal artery occlusion; CRAO or BRAO).

Methods: We performed a retrospective, observational, cohort study using population-based data from the State Inpatient Databases and State Emergency Department Databases from New York (2006-2015), California (2003-2011), and Florida (2006-2015) to determine the association between hospital-documented migraine and retinal stroke.

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Background And Objectives: Cerebral venous thrombosis (CVT) is a rare cause of stroke. While the standard treatment is anticoagulation, the type and duration of anticoagulation depends on the underlying etiology. This study aims to identify prevalence, risk factors, and recurrent venous thromboembolism (VTE) rates among patients with idiopathic (cryptogenic) CVT and CVT provoked by transient (peripartum, hormonal treatment, infection, trauma) and persistent (cancer, thrombophilia) factors.

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  • This study analyzed trends in the use of GLP-1 receptor agonists (GLP-1 RAs) and SGLT2 inhibitors (SGLT2is) among patients with type 2 diabetes and atherosclerotic cardiovascular disease in the US from 2018 to 2022.
  • Researchers used de-identified data from the TriNetX Dataworks-USA network to assess how many patients were prescribed these medications over time, noting a significant increase in their use among newly diagnosed ASCVD patients.
  • Despite the rise in usage, the study concludes that the rate of GLP-1 RA and SGLT2i prescriptions remains low compared to the high prevalence of ASCVD and its associated health
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Introduction: It is important to understand the socioeconomic and medical determinants of subjective cognitive decline (SCD) at a population level in the United States.

Methods: The primary outcomes are state-level rates of SCD and SCD-related functional impairment in adults aged ≥ 45, both measured in the Behavioral Risk Factor Surveillance System from 2016 to 2022. The exposures are state-level rates of poverty, unemployment, homelessness, college education, racial and ethnic minorities, uninsurance, smoking, hypertension, diabetes, and obesity as well as household income and physician density.

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This review explores the extensive evidence linking hypertension with vascular cognitive impairment and dementia, emphasizing its role as a treatable risk factor. Drawing on observational data, it will elucidate how the chronicity of hypertension at different life stages amplifies cognitive decline risk. It explores the mechanisms underlying hypertension's association with dementia, assesses the neuroprotective properties of antihypertensive therapy, and evaluates novel blood pressure metrics and monitoring methods for their diagnostic and therapeutic potential in dementia management.

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Background And Objectives: Sexual and gender minority (SGM) groups have been historically underrepresented in neurologic research, and their brain health disparities are unknown. We aim to evaluate whether SGM persons are at higher risk of adverse brain health outcomes compared with cisgender straight (non-SGM) individuals.

Methods: We conducted a cross-sectional study in the All of Us Research Program, a US population-based study, including all participants with information on gender identity and sexual orientation.

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  • Cervical artery dissection (CeAD) is a leading cause of ischemic strokes in young adults, and this study explored the effects of intravenous thrombolysis (IVT) on patients with CeAD and stroke symptoms.
  • Analyzed data from the STOP-CAD study, it found that IVT significantly improved functional independence after 90 days in patients without increasing the risk of symptomatic intracranial hemorrhage.
  • The results suggest that IVT is a beneficial treatment for eligible patients with CeAD, aligning with current medical guidelines on its use.
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Introduction: Dementia often involves comorbid Alzheimer's and vascular pathology, but their combined impact warrants additional study.

Methods: We analyzed the Systolic Blood Pressure Intervention Trial and categorized white matter hyperintensity (WMH) volume into highest versus lowest/mid tertile and the amyloid beta (Aβ)42/40 ratio into lowest versus mid/highest ratio tertile. Using these binary variables, we created four exposure categories: (1) combined low risk, (2) Aβ risk, (3) WMH risk, and (4) combined high risk.

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Background: The aim of this study was to determine the impact of endovascular thrombectomy (EVT) proceduralist volume on in-hospital mortality in acute ischemic stroke (AIS) patients.

Methods: We performed a retrospective cohort study using the 2020 Florida State Inpatient Database, including adult patients who had a diagnosis of AIS and underwent EVT during the same admission. The primary study outcome was in-hospital death.

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Socioeconomic status (SES) is a multi-faceted theoretical construct associated with stroke risk and outcomes. Knowing which SES measures best correlate with population stroke metrics would improve its accounting in observational research and inform interventions. Using the Centers for Disease Control and Prevention's (CDC) Population Level Analysis and Community Estimates (PLACES) and other publicly available databases, we conducted an ecological study comparing correlations of different United States county-level SES, health care access and clinical risk factor measures with age-adjusted stroke prevalence.

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Importance: Stroke secondary prevention trials have disproportionately enrolled participants with mild or no disability. The impact of this bias remains unclear.

Objective: To investigate the association between poststroke disability and the rate of recurrent stroke during long-term follow up.

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In the last decade, mobile stroke units (MSUs) have shown the potential to transform prehospital stroke care, marking a paradigm shift in delivering ultra-rapid thrombolysis and streamlining triage processes. These units bring acute stroke care directly to patients, significantly shortening treatment times. This review outlines the rationale for MSU care and discusses the potential applications beyond the original purpose of delivering thrombolysis, including large vessel occlusion detection, intracerebral hemorrhage management, and innovative forms of prehospital research.

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Chronological age offers an imperfect estimate of the molecular changes that occur with aging. Epigenetic age, which is derived from DNA methylation data, provides a more nuanced representation of aging-related biological processes. This study examines the bidirectional relationship between epigenetic age and the occurrence of brain health events (stroke, dementia, and late-life depression).

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Introduction: Patients with atrial fibrillation (AF) undergoing elective procedures are at risk for Major Adverse Cardiovascular Events (MACE) and symptomatic bleeding. We aimed to identify risk factors to guide perioperative risk stratification.

Methods: We conducted a post-hoc analysis of the "Bridging Anticoagulation in Patients who Require Temporary Interruption of Warfarin Therapy for an Elective Invasive Procedure or Surgery" randomized trial.

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Background: It is uncertain whether antiplatelets or anticoagulants are more effective in preventing early recurrent stroke in patients with cervical artery dissection. Following the publication of the observational Antithrombotic for STOP-CAD (Stroke Prevention in Cervical Artery Dissection) study, which has more than doubled available data, we performed an updated systematic review and meta-analysis comparing antiplatelets versus anticoagulation in cervical artery dissection.

Methods: The systematic review was registered in PROSPERO (CRD42023468063).

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