Publications by authors named "Yuan V"

Anal cancer is an uncommon disease in a sensitive region of the body that benefits from early and systematic workup and treatment. Main modalities for workup include history, physical examination, and MRI. PET scan and computed tomography scan are helpful in assessing spread of disease.

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  • Increased left ventricular mass is linked to serious heart issues such as cardiomyopathy and atrial fibrillation, with a focus on understanding the variability in regional hypertrophy patterns.
  • The study analyzed data from over 35,000 UK Biobank participants, finding that specific patterns of hypertrophy (apical and septal) are associated with higher risks for cardiovascular problems, independent of overall left ventricular mass.
  • The results indicate that apical and septal hypertrophy may have distinct genetic influences, suggesting the need for more research to explore these variations in diverse populations.
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Background: Strict patient isolation in hospital is associated with adverse health outcomes. However, there is a lack of high-quality evidence for effective interventions to improve safety and quality of care for these patients.

Aims: To identify patient reported areas for improvement in the care of patients in hospital isolation and to determine the feasibility of collecting patient reported outcomes using validated tools.

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  • The rise of omic data brings new challenges in how we handle, analyze, and integrate this information, which is crucial for biological research.
  • Bioconductor serves as a comprehensive platform for community-driven analysis of biological data, while tidy R programming introduces an innovative approach for organizing and manipulating data.
  • The tidyomics software ecosystem connects Bioconductor with tidy R practices, aiming to simplify omic analysis and facilitate collaboration across different scientific disciplines, as evidenced by its successful application in analyzing a large dataset from the Human Cell Atlas.
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Article Synopsis
  • - The increasing amount of omic data creates challenges in how to manage, analyze, and integrate this information.
  • - Bioconductor offers a community-driven platform for biological data analysis, while tidy R programming introduces a new standard for organizing and manipulating data.
  • - This software ecosystem connects Bioconductor with tidy R, aiming to simplify omic analysis and foster collaborations, demonstrated through the analysis of 7.5 million cells from the Human Cell Atlas.
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Introduction: Anti-Asian sentiment increased when the SARS-CoV-2 virus reached the United States in 2020. Trends in national assaults occurring during the COVID-19 pandemic in the Asian American, Native Hawaiian, and Pacific Islander (AANHPI) community were evaluated.

Methods: Patients treated for assaults by emergency medical services between January 2019 and December 2021 were extracted from ImageTrend Collaborate, a national database.

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Molecular quantitative trait loci (QTLs) allow us to understand the biology captured in genome-wide association studies (GWASs). The placenta regulates fetal development and shows sex differences in DNA methylation. We therefore hypothesized that placental methylation QTL (mQTL) explain variation in genetic risk for childhood onset traits, and that effects differ by sex.

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Recent research has effectively used quantitative traits from imaging to boost the capabilities of genome-wide association studies (GWAS), providing further understanding of disease biology and various traits. However, it's important to note that phenotyping inherently carries measurement error and noise that could influence subsequent genetic analyses. The study focused on left ventricular ejection fraction (LVEF), a vital yet potentially inaccurate quantitative measurement, to investigate how imprecision in phenotype measurement affects genetic studies.

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Objectives: Selective prehospital cervical spine motion restriction (C-SMR) following blunt trauma has increasingly been used by emergency medical service (EMS) providers. We determined rates of prehospital C-SMR and concomitant radiographic injury patterns.

Methods: A retrospective trauma registry and chart review was conducted for all adult blunt trauma patients who were transported by EMS and hospitalized with radiographic cervical spine injuries from 2011 to 2019 at a level 1 trauma center.

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Background: Appendectomy is the gold standard for simple appendicitis. During the coronavirus-19 pandemic, it was estimated that appendectomies in the United States decreased by 24%. We aimed to describe trends in acute appendicitis management at a center located in one of the largest epicenters of the pandemic.

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Background: Genome-wide DNA methylation (DNAme) profiling of the placenta with Illumina Infinium Methylation bead arrays is often used to explore the connections between in utero exposures, placental pathology, and fetal development. However, many technical and biological factors can lead to signals of DNAme variation between samples and between cohorts, and understanding and accounting for these factors is essential to ensure meaningful and replicable data analysis. Recently, "epiphenotyping" approaches have been developed whereby DNAme data can be used to impute information about phenotypic variables such as gestational age, sex, cell composition, and ancestry.

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A growing body of literature has reported molecular and histological changes in the human placenta in association with preeclampsia (PE). Placental DNA methylation (DNAme) and transcriptomic patterns have revealed molecular subgroups of PE that are associated with placental histopathology and clinical phenotypes of the disease. However, the clinical and molecular heterogeneity of PE both across and within subtypes complicates the study of this disease.

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Dermal papilla (DP) cells are specialized mesenchymal cells that play a crucial role in regulating hair morphology, colour and growth through the secretion of specific factors. It is still unclear what the source of progenitor cells is for dermal cell regeneration during wound healing, and whether DP cells are involved in this process. We analyzed the gene expression profile of various skin cell populations using existing datasets and found that the Hey2 gene was predominantly expressed in DP cells.

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Many people suffer from hair loss and abnormal skin pigmentation, highlighting the need for simple assays to support drug discovery research. Current assays have various limitations, such as being in vitro only, not sensitive enough, or unquantifiable. We took advantage of the bilateral symmetry and large size of mouse whisker follicles to develop a novel in vivo assay called "whisker follicle microinjection assay".

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: Genome-wide DNA methylation (DNAme) profiling of the placenta with Illumina Infinium Methylation bead arrays is often used to explore the connections between exposures, placental pathology, and fetal development. However, many technical and biological factors can lead to signals of DNAme variation between samples and between cohorts, and understanding and accounting for these factors is essential to ensure meaningful and replicable data analysis. Recently, "epiphenotyping" approaches have been developed whereby DNAme data can be used to impute information about phenotypic variables such as gestational age, sex, cell composition, and ancestry.

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Background: Infants with single-ventricle (SV) physiology undergo the 3-stage Fontan surgery. Norwood patients, who have completed the first stage, face the highest interstage mortality. The Berlin Heart EXCOR (BH), a pediatric pulsatile ventricular assist device, has shown promise in supporting these patients.

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Background: Quantification of chamber size and systolic function is a fundamental component of cardiac imaging. However, the human heart is a complex structure with significant uncharacterized phenotypic variation beyond traditional metrics of size and function. Examining variation in cardiac shape can add to our ability to understand cardiovascular risk and pathophysiology.

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Background: Recent studies have leveraged quantitative traits from imaging to amplify the power of genome-wide association studies (GWAS) to gain further insights into the biology of diseases and traits. However, measurement imprecision is intrinsic to phenotyping and can impact downstream genetic analyses.

Methods: Left ventricular ejection fraction (LVEF), an important but imprecise quantitative imaging measurement, was examined to assess the impact of precision of phenotype measurement on genetic studies.

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Congenital heart disease (CHD) is often associated with fetal growth abnormalities. During the first trimester of pregnancy, the heart and placenta develop concurrently, and share key developmental pathways. It is hypothesized that defective morphogenesis of either organ is synergistically linked.

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Introduction And Hypothesis: The objective of this study was to evaluate the impact of patient- and physician-directed education in the primary care setting on screening, diagnosis, treatment, and referral patterns to Urogynecology for urinary incontinence (UI).

Methods: This was a prospective, multi-phase, before-and-after study conducted over a 3-year period. New female patients, 40 years and older, seen in the Internal Medicine (IM) clinic of our institution, were included.

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Purpose: The Berlin Heart EXCOR (BH) is the only FDA-approved, extracorporeal pulsatile ventricular assist device (VAD) for infants and children with heart failure. Clinicians control four settings on the device-systolic and diastolic drive pressures, device pump rate, and systolic time as a percentage of the pump cycle. However, interactions between BH pneumatics and the native circulation remain poorly understood.

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Elective joint arthroplasty is a commonly performed procedure with postoperative cardiovascular complications occurring in up to 3% of elderly patients. Preoperative cardiac evaluation, including transthoracic echocardiography, may improve risk stratification and optimise perioperative outcomes in patients having non-cardiac surgery.This study aimed to investigate the frequency, indications, appropriateness and consequences of preoperative transthoracic echocardiography in elective joint arthroplasty patients.

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