2,560 results match your criteria: "Canada and Northern Ontario School of Medicine; Gwen.healey@qhrc.ca.[Affiliation]"

Contribution Analysis (CA) is a promising theory-based evaluation approach for complex interventions, yet its application in health interventions remains largely unexplored. To bridge this gap, we conducted a scoping review to examine the extent of such applications and the methodologies, strengths, and limitations of this approach in health programming. Our comprehensive search strategy was developed and used in 15 databases to identify peer-reviewed articles from 1999 to 2023 that focused on using CA to evaluate health interventions.

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Mineralocorticoid Antagonism in Heart Failure: Established and Emerging Therapeutic Role.

JACC Heart Fail

December 2024

Saint Luke's Mid America Heart Institute, Kansas City, Missouri, USA; University of Missouri-Kansas City School of Medicine, Kansas City, Missouri, USA. Electronic address:

The pathophysiology of heart failure (HF) is related to the overactivation of the mineralocorticoid receptor, leading to fluid retention and adverse myocardial remodeling. Although mineralocorticoid receptor antagonists (MRAs) are recommended for the treatment of heart failure with reduced ejection fraction (HFrEF), they remain underused due to adverse effects such as hyperkalemia; and their efficacy is controversial in heart failure with mildly reduced ejection fraction (HFmrEF) and heart failure with preserved ejection fraction (HFpEF). Recent trials in people with diabetes and kidney disease have supported the use of nonsteroidal MRAs in reducing HF-related morbidity and mortality and have fewer side effects than their steroidal counterparts.

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Adrenal gland metastases from malignant melanoma are a common but poorly characterised condition. Their lack of consistent clinical features and poor response to immune checkpoint inhibitors pose a significant diagnostic and therapeutic challenge to practitioners. This case report describes a 78-year-old male with no prior history of melanoma presenting with nonspecific abdominal symptoms and unintentional weight loss who was found to have undifferentiated bilateral adrenal gland metastases from malignant melanoma.

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Background: Health-focused research funders increasingly support multi-country research partnerships that study health, urban development and equity in global settings. To develop new knowledge that benefits society, these grants require researchers to integrate diverse knowledges and data, and to manage research-related aspects of coloniality, such as power imbalances and epistemic injustices. We conducted research to develop a transdisciplinary study proposal with partners in multiple middle and high income countries, aiming to embed equity into the methodology and funding model.

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Article Synopsis
  • The study investigates the use of non-invasive stress imaging (NISI) in patients with low HEART risk scores who are discharged from the emergency department and may face diagnostic challenges.
  • A total of 1,384 patients were included in the study, and the findings showed that NISI effectively predicted both primary cardiac events (like cardiac death and non-fatal heart attacks) and secondary cardiovascular-related issues, over a follow-up period of about 634 days.
  • Specific risk factors such as diabetes, prior coronary artery disease, and abnormal NISI results were significant predictors of adverse cardiac events in this low-risk group.
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Accuracy of Computer-aided Diagnosis in Colonoscopy Varies According to Polyp Location: A Systematic Review and Meta-analysis.

Clin Gastroenterol Hepatol

August 2024

IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy.

Article Synopsis
  • - The study investigates how the location of colorectal polyps (proximal vs. distal colon) affects the performance of computer-aided diagnosis (CADx) in identifying neoplastic and non-neoplastic polyps during colonoscopies for polyps sized 5 mm or smaller.
  • - It analyzes data from 11 studies involving 7,782 polyps, showing that CADx has lower specificity and accuracy in the proximal colon compared to the distal colon, while sensitivity is similar between both locations.
  • - The conclusion highlights that while CADx works well for distal polyps, its inadequate performance in the proximal colon means it should not currently be used for those lesions until improved systems are created.
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Background/aim: Despite therapeutic advancements, metastatic colorectal cancer is usually fatal, necessitating novel approaches based on the molecular pathogenesis to improve outcomes. Some colorectal cancers have no mutations in the extended RAS panel (KRAS, NRAS, BRAF) genes and represent a special subset, which deserves particular therapeutic considerations.

Materials And Methods: The genomic landscape of colorectal cancers from publicly available genomic series was interrogated, using the cBioportal platform.

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Background: Load management is a sports science concept describing the execution of well-established training principles to measure athletic workloads and enhance performance. The term 'load management' has become common in sports media to refer to a much wider range of scenarios, including the idea that by limiting regular season workload for athletes, their health and playoff performance will improve. Varying links between load and performance have been demonstrated in baseball and soccer.

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Preoperative Computed Tomography Imaging Accurately Identifies Adrenal Gland Involvement In Patients With Renal Masses.

Urology

December 2024

Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY; Department of Urology, Faculty of Medicine, University of Alexandria, Egypt.

Objective: To determine the frequency of adrenal gland involvement (AGI) in patients with renal cell carcinoma (RCC) and assess the ability of preoperative computed tomography (CT) imaging to predict AGI prior to radical nephrectomy (RN).

Methods: We retrospectively identified 90 patients who underwent RN with concomitant ipsilateral adrenalectomy (CIA) between 2019 and 2021 at our institution. We reviewed the preoperative CT findings and final pathology reports to assess AGI and determine the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of preoperative CT imaging.

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Article Synopsis
  • There is a significant need for clinical trials that include infants, children, and adolescents to ensure evidence-based care; this communication discusses three different trial design strategies to address this issue.
  • The three strategies include sequential, parallel, and unified adult-pediatric Bayesian adaptive designs, which allow for better integration of pediatric populations into clinical research.
  • The unified design, exemplified by the SNAP trial, utilizes Bayesian hierarchical models to share data across age groups, enhancing accuracy in assessing treatment safety and efficacy for both children and adults.
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Apixaban vs rivaroxaban in patients with atrial fibrillation at high or low bleeding risk: A population-based cohort study.

Heart Rhythm

August 2024

Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada; ICES, Toronto and North, Ontario, Canada; Division of Cardiology, Schulich Heart Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.

Background: Despite many atrial fibrillation (AF) patients being at risk of bleeding, very limited data are available on bleeding rates of different direct oral anticoagulants based on the spectrum of bleeding risk.

Objective: We aimed to compare the risk of major bleeding and thromboembolic events with apixaban vs rivaroxaban for AF patients stratified by bleeding risk.

Methods: We conducted a population-based, retrospective cohort study of all adult patients (66 years or older) with AF in Ontario, Canada, who were treated with apixaban or rivaroxaban between April 1, 2011, and March 31, 2020.

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Overactivation of mineralocorticoid receptors occurs in cardiorenal diseases. Many patients with type 2 diabetes often progress to chronic kidney disease (CKD) and require dialysis. Finerenone is the first oral non-steroidal mineralocorticoid receptor (MR) antagonist used in patients with diabetic kidney disease and heart failure.

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Introduction: Despite sparse systematic evidence, current exercise heat safety recommendations suggest that antihistamines blunt sweating and increase the risk for heat-related injury during exertional heat stress. The primary purpose of the present study was to examine whether diphenhydramine hydrochloride (DPH), a first-generation antihistamine, affects the sweating, core temperature, and heart rate (HR) response during exertional heat stress using a double-blind randomized crossover design.

Methods: On two occasions separated by >48 h, 20 healthy adults (10 females, 23 ± 3 yr, body surface area: 1.

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Natural background ionizing radiation is present on the earth's surface; however, the biological role of this chronic low-dose-rate exposure remains unknown. The Researching the Effects of the Presence and Absence of Ionizing Radiation (REPAIR) project is examining the impacts of sub-natural background radiation exposure through experiments conducted 2 km underground in SNOLAB. The rock overburden combined with experiment-specific shielding provides a background radiation dose rate 30 times lower than on the surface.

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Background:  Participating in surveys can shape the perception of participants related to the study topic. Administering a vaccine hesitancy questionnaire can have negative impacts on participants' vaccine confidence. This is particularly true for online and cross-cultural data collection because culturally safe health education to correct misinformation is typically not provided after the administration of an electronic survey.

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Risk Stratification in Cardiac Sarcoidosis With Cardiac Positron Emission Tomography: A Systematic Review and Meta-Analysis.

JACC Cardiovasc Imaging

September 2024

Department of Cardiology, London Health Sciences Centre, Western University, London, Ontario, Canada. Electronic address:

Background: Although positron emission tomography (PET) imaging is well established for its diagnostic role in cardiac sarcoidosis, less is known about the prognostic value of PET and its use in risk stratification for major adverse cardiac events (MACE).

Objectives: The goal of this study was to perform a systematic review and meta-analysis looking at the prognostic value of PET imaging in patients with cardiac sarcoidosis.

Methods: Study investigators systematically searched EMBASE (Excerpta Medica dataBASE), MEDLINE, PubMed, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, CINAHL (Cumulative Index to Nursing and Allied Health Literature), ClinicalTrials.

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Background: A minority of patients with MSS tumors present a high tumor mutation burden (TMB) without underlying MMR defects.

Methods: Publicly available genomic series were assessed for identification of patients with MSS gastric gastroesophageal junction, and esophageal adenocarcinomas and a high TMB, defined as more than 10 mutations per Mb. These were compared with MSS cancers and a low TMB for genetic alterations and for survival outcomes.

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Background: The International Federation for Emergency Medicine (IFEM) published its model curriculum for medical student education in emergency medicine in 2009. Because of the evolving principles of emergency medicine and medical education, driven by societal, professional, and educational developments, there was a need for an update on IFEM recommendations. The main objective of the update process was creating Intended Learning Outcomes (ILOs) and providing tier-based recommendations.

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Comparison of binocular reading speed in patients with strabismus without amblyopia versus controls.

Can J Ophthalmol

August 2024

Northern Ontario School of Medicine, Thunder Bay, ON; Canada; Ophthalmology Services, Department of Surgery, Thunder Bay Regional Health Sciences Centre, Thunder Bay, ON. Electronic address:

Objective: Amblyopia has been shown to slow reading speed. Limited literature exists on reading speed in strabismus without amblyopia. Our study compares binocular reading speed in patients with strabismus without amblyopia versus normal controls.

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Study Objective: Identify high-risk clinical characteristics for a serious cause of vertigo in patients presenting to the emergency department (ED).

Methods: Multicentre prospective cohort study over 3 years at three university-affiliated tertiary care EDs. Participants were patients presenting with vertigo, dizziness or imbalance.

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Background: A coordinated care system helps provide timely access to treatment for suspected acute stroke. In Northwestern Ontario (NWO), Canada, communities are widespread with several hospitals offering various diagnostic equipment and services. Thus, resources are limited, and health care providers must often transfer patients with stroke to different hospital locations to ensure the most appropriate care access within recommended time frames.

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