Publications by authors named "Welsh R"

Background: Rumination is implicated in the onset and maintenance of major depressive disorder (MDD). Rumination-Focused Cognitive Behavioral Therapy (RF-CBT) effectively targets rumination and may change resting-state brain connectivity and change in activation during a rumination induction task (RIT) post-intervention predicts depressive symptoms two years later. We examined brain activation changes during an RIT in adolescents with remitted MDD following RF-CBT and evaluated RIT reliability (or stability) during treatment as usual (TAU).

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Background: In STREAM-1 (Strategic Reperfusion Early After Myocardial Infarction), excess intracranial hemorrhage occurred in patients aged ≥75 years receiving full-dose tenecteplase as part of a pharmaco-invasive strategy, whereas no further intracranial hemorrhage occurred after halving the tenecteplase dose. In STREAM-2 (Second Strategic Reperfusion Early After Myocardial Infarction), half-dose tenecteplase was an effective and safe pharmaco-invasive strategy in older patients with ST-segment-elevation myocardial infarction presenting within <3 hours, compared with primary percutaneous coronary intervention (PCI). We prespecified evaluating the efficacy and safety of a half-dose versus full-dose pharmaco-invasive strategy and compared the half-dose pharmaco-invasive strategy to primary PCI in patients aged ≥75 years.

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Improving school climate is important to reducing disparities in exclusionary discipline, yet the relationship between school climate and school discipline remains poorly understood. Although prior studies have largely relied on students' perceptions to measure school climate, few studies have examined how school contextual factors such as prior disciplinary history or school personnel may affect students' perception of school climate. In the present study, we used student responses from the annually administered New York City School Survey to examine the relationship between student perception of school climate and school personnel, drawing on a longitudinal student-level sample for public middle and high schools for the years 2011-2012 through 2018-2019 (N = 3,988,020 student-years).

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Article Synopsis
  • Cardiac myosin-specific T cells are important in causing heart problems when treated with certain cancer medications.
  • Researchers studied mouse hearts to see how these T cells act and found that they change when there's heart damage.
  • They discovered that after recovering from heart injuries, mice became more likely to develop heart issues when given these cancer drugs, and they also found similar T cells in human patients with heart problems.
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Transcatheter aortic valve replacement (TAVR) has become the standard of care for high surgical risk patients with aortic stenosis. The most common approach to TAVR is transfemoral utilizing monitored anesthesia care or general anesthesia. On occasion, transfemoral access is not possible and alternative access to TAVR is required.

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The past decade has seen impressive advances in neuroimaging, moving from qualitative to quantitative outputs. Available techniques now allow for the inference of microscopic changes occurring in white and gray matter, along with alterations in physiology and function. These existing and emerging techniques hold the potential of providing unprecedented capabilities in achieving a diagnosis and predicting outcomes for traumatic brain injury (TBI) and a variety of other neurological diseases.

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Self-reported driver behaviour has long been a tool used by road safety researchers to classify drivers and to evaluate the impact of interventions yet the relationship with real-world driving is challenging to validate due to the need for extensive, detailed observations of normal driving. This study examines this association by applying the large UDRIVE naturalistic driving study data involving 96 car drivers, comprising 131,462 trips and 1,459,110 km travelled over a duration of 32,096 hours, to compare individual questions and composite indicators based on the Driver Behaviour Questionnaire with real world driving. Self-reported speed behaviour was compared to the measured values under urban and highway conditions.

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Article Synopsis
  • Atherosclerotic cardiovascular disease (ASCVD) is a major health issue, with a focus on the role of apolipoprotein B (ApoB)-containing lipoproteins in its progression, shifting from the earlier "low-density lipoprotein hypothesis" to the current "ApoB principle."
  • The article reviews extensive evidence from genetic, epidemiologic, and clinical studies supporting the connection between ApoB lipoproteins and ASCVD development.
  • It also examines global guidelines on dyslipidemia management, noting broad consensus on controlling low-density lipoprotein cholesterol and ApoB levels to reduce cardiovascular risks, with some differences compared to Canadian guidelines.
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Objective: To assess the characteristics and clinical outcomes of patients with lower extremity peripheral artery disease (PAD) in XATOA receiving dual pathway inhibition (DPI) with rivaroxaban 2.5 mg twice daily plus aspirin according to lower extremity revascularisation (LER) history.

Methods: XATOA is an international, multicentre, prospective, single arm registry study.

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Background: Randomised trials are essential to reliably assess medical interventions. Nevertheless, interpretation of such studies, particularly when considering absolute effects, is enhanced by understanding how the trial population may differ from the populations it aims to represent.

Methods: We compared baseline characteristics and mortality of RECOVERY participants recruited in England (n = 38,510) with a reference population hospitalised with COVID-19 in England (n = 346,271) from March 2020 to November 2021.

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Arterial spin labeling (ASL) perfusion MRI is the only non-invasive imaging technique for quantifying regional cerebral blood flow (CBF), which is a fundamental physiological variable. ASL MRI has a relatively low signal-to-noise-ratio (SNR). In this study, we proposed a novel ASL denoising method by simultaneously exploiting the inter- and intra-receive channel data correlations.

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Objective: The corticospinal tract (CST) reveals progressive microstructural alterations in ALS measurable by DTI. The aim of this study was to evaluate fractional anisotropy (FA) along the CST as a longitudinal marker of disease progression in ALS.

Methods: The study cohort consisted of 114 patients with ALS and 110 healthy controls from the second prospective, longitudinal, multicentre study of the Canadian ALS Neuroimaging Consortium (CALSNIC-2).

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Background: Patients with prior coronary artery bypass grafting (CABG) presenting with an acute coronary syndrome (ACS) have poor outcomes and the optimal treatment strategy for this population is unknown.

Methods: Using linked administrative databases, we examined patients with an ACS between 2008 and 2019, identifying patients with prior CABG. Patients were categorized by ACS presentation type and treatment strategy.

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Background And Aims: In the COMPASS trial, low-dose rivaroxaban with aspirin improved cardiovascular outcomes in patients with atherosclerotic cardiovascular disease (ASCVD). We aimed to assess the potential clinical implications of this therapy in a generalizable population.

Methods And Results: A retrospective cohort of adults with ASVCD was formed using healthcare administrative databases in Alberta, Canada (population 4.

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Introduction: Loeys-Dietz syndrome (LDS) is a heritable disease that is the result of dysregulation of the transforming growth factor beta (TGFβ) pathway. The pathogenic variants associated with the condition are linked to aortic aneurysms and dissections along with other cardiovascular and non-cardiovascular abnormalities. LDS type III is associated with pathogenic variants in the SMAD3 gene responsible for signally in the TGFβ pathway.

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Wastewater surveillance is a valuable tool that can be used to track infectious diseases in a community. In September 2020, the Centers for Disease Control and Prevention (CDC) established the National Wastewater Surveillance System (NWSS) to coordinate and build the nation's capacity to detect and quantify concentrations of SARS-CoV-2 RNA in U.S.

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Background: In patients with ST-segment-elevation myocardial infarction complicated by cardiogenic shock, primary percutaneous coronary intervention (pPCI) is the preferred revascularization option. Little is known about the efficacy and safety of a pharmacoinvasive approach for patients with cardiogenic shock presenting to a non-PCI hospital with prolonged interhospital transport times.

Methods: In a retrospective analysis of geographically extensive ST-segment-elevation myocardial infarction network (2006-2021), 426 patients with cardiogenic shock and ST-segment-elevation myocardial infarction presented to a non-PCI-capable hospital and underwent reperfusion therapy (53.

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Article Synopsis
  • This study explored how brain degeneration correlates with the progression of amyotrophic lateral sclerosis (ALS) by analyzing brain scans of 149 ALS patients and 144 healthy controls.
  • Researchers used a texture analysis method on MRI scans to identify "autocorrelation," a biomarker indicating brain degeneration, focusing on different stages of the disease.
  • Results showed that brain changes varied significantly depending on the criteria used for patient classification, suggesting that standard clinical trial measures may not fully capture the extent of brain degeneration in ALS patients.
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Regulatory T cells (Treg) are crucial immune modulators, yet the exact mechanism of thymic Treg development remains controversial. Here, we present the first direct evidence for H2-O, an MHC class II peptide editing molecular chaperon, on selection of thymic Tregs. We identified that lack of H2-O in the thymic medulla promotes thymic Treg development and leads to an increased peripheral Treg frequency.

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Candida auris is a newly emerged multidrug-resistant fungus capable of causing invasive infections with high mortality. Despite intense efforts to understand how this pathogen rapidly emerged and spread worldwide, its environmental reservoirs are poorly understood. Here, we present a collaborative effort between the U.

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