Publications by authors named "Hadley D"

Importance: Asymptomatic blood pressure (BP) elevations in the hospital are commonly treated with as-needed BP medications, including recurring as-needed and 1-time administration. Veterans represent a population at risk of ischemic events from rapid lowering of BP, but the impact of as-needed BP medication use in this population is unknown.

Objective: To assess the risks of acute kidney injury (AKI) and other outcomes from as-needed BP medication administration in a hospitalized veteran cohort.

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Background: Large-scale data on incidental premature ventricular contraction (PVC) prevalence and morphologies have been lacking, leaving many providers without guidance on further cardiac testing for patients with incidental PVCs on ECG. Athletes offer an intriguing cohort to understand the clinical significance, prevalence, and common morphologies of incidental PVCs because they often undergo ECG screening during preparticipation exams.

Methods: Digital ECGs were obtained from 10 728 screened athletes aged 14 to 35 years during mass screenings in schools and professional sports teams between 2014 and 2021.

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Gastric heterotopia (GH) is a rare cause of gastrointestinal bleeding. GH of the small bowel is rare, and the duodenum is more commonly involved than the jejunum. Here, we present five cases of GH involving the duodenum and jejunum, with presentations including gastrointestinal bleeding, symptomatic anemia, and no symptoms.

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Article Synopsis
  • The study analyzed 5804 days of Super-Kamiokande data from 1996 to 2018 to detect variations in solar ^{8}B neutrino flux.
  • The researchers utilized a five-day interval measurement approach and employed maximum likelihood and Lomb-Scargle methods to find any periodic modulations.
  • They found a significant modulation related to Earth's elliptical orbit around the Sun, with measurements of eccentricity and perihelion shift aligning with astronomical data.
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Objective: ST segment deviations around the isoelectric line are common findings in manifest cardiovascular disease. In athletes, ST elevation is common, while ST depression is considered rare. However, clinical studies in athletes have associated ST depression with myocardial fibrosis and fatty infiltration and ST elevation with pericarditis and myocarditis.

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Introduction: Low QRS peak-to-nadir voltage (LQRSV) is associated with arrhythmogenic right ventricular cardiomyopathy (ARVC) and other cardiomyopathies. Recent studies have proposed criteria for LQRSV when screening athletes for cardiovascular disease. These criteria have not yet been evaluated in a large population of healthy young athletes.

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Objectives: Tetralogy of Fallot (TOF) is the most common cyanotic congenital heart defect in the United States. We aimed to identify genetic variations associated with TOF using meta-analysis of publicly available digital samples to spotlight targets for prevention, screening, and treatment strategies.

Methods: We used the Search Tag Analyze Resource for Gene Expression Omnibus (STARGEO) platform to identify 39 TOF and 19 non-TOF right ventricle tissue samples from microarray data and identified upregulated and downregulated genes.

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Background: A lack of onsite clinical trials is the largest barrier to participation of cancer patients in trials. Development of an automated process for regional trial eligibility screening first requires identification of patient electronic health record data that allows effective trial screening, and evidence that searching for trials regionally has a positive impact compared with site-specific searching.

Methods: To assess a screening framework that would support an automated regional search tool, a set of patient clinical variables was analyzed for prescreening clinical trials.

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  • - The T2K experiment reports enhanced measurements of neutrino oscillation parameters through new proton-on-target (POT) neutrino data, significantly improving analysis methods with a major focus on the near detector's new selection procedures.
  • - This analysis is the first to utilize data from the NA61/SHINE experiment, helping to refine the neutrino flux model and enhance the neutrino interaction model by incorporating new nuclear effects.
  • - Both frequentist and Bayesian approaches indicate a preference for normal mass ordering and a nearly maximal CP-violating phase, with notable exclusions and constraints on certain parameters aligning with past T2K studies.
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The etiology of monoclonal gammopathy of undetermined significance (MGUS) and multiple myeloma (MM) is still obscure as are the processes that enable the progression of MGUS to MM. Understanding the unique vs. shared transcriptomes can potentially elucidate why individuals develop one or the other.

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We report a search for cosmic-ray boosted dark matter with protons using the 0.37  megaton×years data collected at Super-Kamiokande experiment during the 1996-2018 period (SKI-IV phase). We searched for an excess of proton recoils above the atmospheric neutrino background from the vicinity of the Galactic Center.

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  • Genomic testing is becoming more complex, especially with polygenic risk factors, making it harder for families and health care providers to understand and communicate information about genetic risks, particularly for conditions like Parkinson's disease.
  • This study focuses on a multi-generational family with specific genetic variants linked to Parkinson's, examining their experiences and challenges in dealing with the risks associated with these variants.
  • The findings highlight issues related to risk perception, the recall of genetic information, and family communication, pointing to the need for more research to better support families and genetic counselors facing similar challenges.
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  • * The research analyzed data from around 32,000 CAD patients over eight years, focusing on the timeline from admission through treatment and comparing average waiting times for men and women.
  • * Results show that women wait significantly longer from their initial consultation to the diagnostic cardiac catheterization compared to men, indicating a need for improving timely diagnosis to enhance treatment outcomes.
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Study Design: A retrospective study at a single academic institution.

Objective: The purpose of this study is to utilize machine learning to predict hospital length of stay (LOS) and discharge disposition following adult elective spine surgery, and to compare performance metrics of machine learning models to the American College of Surgeon's National Surgical Quality Improvement Program's (ACS NSQIP) prediction calculator.

Summary Of Background Data: A total of 3678 adult patients undergoing elective spine surgery between 2014 and 2019, acquired from the electronic health record.

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Background: Crohn's Disease (CD) is an inflammatory disease of the gastrointestinal tract that affects millions of patients. While great strides have been made in treatment, namely in biologic therapy such as anti-TNF drugs, CD remains a significant health burden.

Method: We conducted two meta-analyses using our STARGEO platform to tag samples from Gene Expression Omnibus.

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  • Hepatitis B virus (HBV) can lead to liver cancer (hepatocellular carcinoma) through oncogenic processes, not just cirrhosis, highlighting the need to identify specific genes and pathways involved.
  • The study aims to better understand how HBV contributes to liver cancer and to find potential therapeutic targets using a meta-analysis of tumor and adjacent non-tumor samples.
  • Key findings include the identification of RABL6 and HOXA10 as significant regulators in HBV-related liver cancer, with RABL6 linked to increased mortality and HOXA10 implicated in tumor growth through mechanisms like downregulation of tumor suppressors.
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Background: Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease in the United States and globally. The currently understood model of pathogenesis consists of a 'multiple hit' hypothesis in which environmental and genetic factors contribute to hepatic inflammation and injury.

Aim: To examine the genetic expression of NAFLD and non-alcoholic steatohepatitis (NASH) tissue samples to identify common pathways that contribute to NAFLD and NASH pathogenesis.

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Objectives: The 12-lead electrocardiogram (ECG) is used in the preparticipation screening examination for athletes. Despite known differences in ECG findings by sex, only QTc prolongation is given a sex-specific threshold. We hypothesize that our large dataset-with diversity in age, race, and sport participation-can be utilized to improve ECG screening in female student athletes.

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Early detection plays a key role to enhance the outcome for Coronary Artery Disease. We utilized a big data analytics platform on ∼32,000 patients to trace patients from the first encounter to CAD treatment. There are significant gender-based differences in patients younger than 60 from the time of the first encounter to Coronary Artery Bypass Grafting with a p-value=0.

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  • Precision medicine should consider social, cultural, and environmental factors to enhance health outcomes, as race impacts these dimensions beyond genetics.
  • The study examines how race, often linked to socioeconomic factors, affects patient outcomes in diagnosing and treating Coronary Artery Disease (CAD).
  • Findings from the University of California San Francisco Medical Centers showed no racial discrepancies in CAD treatment, leading to new research opportunities in this area.
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The development of an ontology facilitates the organization of the variety of concepts used to describe different terms in different resources. The proposed ontology will facilitate the study of cardiothoracic surgical education and data analytics in electronic medical records (EMR) with the standard vocabulary.

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Our objective was to develop deep learning models with chest radiograph data to predict healthcare costs and classify top-50% spenders. 21,872 frontal chest radiographs were retrospectively collected from 19,524 patients with at least 1-year spending data. Among the patients, 11,003 patients had 3 years of cost data, and 1678 patients had 5 years of cost data.

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