201 results match your criteria: "Geffen School of Medicine at University of California at Los Angeles[Affiliation]"

Referral Networks, Racial Inequity, and Hospital Quality for Open Heart Surgery.

Circ Cardiovasc Qual Outcomes

December 2024

RAND Corporation, Santa Monica, CA (C.B.G., C.L.D., S.Z., M.S., L.J.M., I.P.).

Background: Differences in the quality of hospitals where Black and White patients receive coronary artery bypass grafting (CABG) surgery have been documented. We examined the contributions of physician networks to the gap.

Methods: This was a cross-sectional study of all Medicare fee-for-service Black and White patients undergoing elective CABG during 2017 to 2019; the primary care physicians and cardiologists treating them for 12 months before surgery (the patients' physician network); and CABG-performing hospitals within 100 miles of each patient.

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A Novel Machine Learning Model to Predict Revision ACL Reconstruction Failure in the MARS Cohort.

Orthop J Sports Med

November 2024

Luminis Health Orthopedics, Pasadena, Maryland, USA.

Background: As machine learning becomes increasingly utilized in orthopaedic clinical research, the application of machine learning methodology to cohort data from the Multicenter ACL Revision Study (MARS) presents a valuable opportunity to translate data into patient-specific insights.

Purpose: To apply novel machine learning methodology to MARS cohort data to determine a predictive model of revision anterior cruciate ligament reconstruction (rACLR) graft failure and features most predictive of failure.

Study Design: Cohort study; Level of evidence, 3.

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Background: Six randomized trials have not detected a difference between intravenous alteplase plus endovascular thrombectomy and endovascular thrombectomy alone in stroke. Tenecteplase, a recombinant human tenecteplase tissue-type plasminogen activator, is a genetically modified variant of alteplase. It is unclear whether the outcomes are different if alteplase is replaced with tenecteplase.

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Bruck syndrome is an autosomal recessive form of osteogenesis imperfecta caused by biallelic variants in PLOD2 or FKBP10 and is characterized by joint contractures, bone fragility, short stature, and scoliosis. PLOD2 encodes LH2, which hydroxylates type I collagen telopeptide lysines, a critical step for collagen crosslinking. The Plod2 global knockout mouse model is limited by early embryonic lethality, and thus, the role of PLOD2 in skeletogenesis is not well understood.

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Background And Aims: Emergency departments (EDs) provide an opportunity to identify people at risk of overdose and reduce the risk. We evaluated the effect of an ED behavioral intervention delivered by peer recovery support specialists (PRSSs) on non-fatal opioid overdose.

Design: Two-arm, randomized trial.

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Integrating datasets from multiple sites and scanners can increase statistical power for neuroimaging studies but can also introduce significant inter-site confounds. We evaluated the effectiveness of ComBat, an empirical Bayes approach, to combine longitudinal preclinical MRI data acquired at 4.7 or 9.

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Background: Approximately half of patients who achieve successful reperfusion do not achieve functional independence. The present study sought to investigate the clinical outcomes and safety of intraarterial or intravenous tirofiban as adjunct therapy in patients with acute basilar artery occlusion who had achieved successful recanalization with endovascular treatment.

Methods And Results: In the national, prospective BASILAR (Endovascular Treatment for Acute Basilar Artery Occlusion Study) registry, 458 patients who met inclusion criteria were divided into 3 groups based on tirofiban administration (no tirofiban, n=262; intravenous tirofiban, n=101; intraarterial+intravenous tirofiban, n=95).

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Article Synopsis
  • A study evaluated the effectiveness and safety of intravenous tirofiban versus alteplase before endovascular treatment in patients with acute ischemic stroke caused by large vessel occlusion.
  • Data was analyzed from two multicenter trials, comparing functional independence and safety outcomes like intracranial hemorrhage and mortality rates between the two treatment groups.
  • Results indicated that tirofiban led to higher rates of functional independence compared to alteplase, and there were no significant differences in safety outcomes between the two treatments.
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Purpose: To summarize the literature regarding the performance of mammography-image based artificial intelligence (AI) algorithms, with and without additional clinical data, for future breast cancer risk prediction.

Materials And Methods: A systematic literature review was performed using six databases (medRixiv, bioRxiv, Embase, Engineer Village, IEEE Xplore, and PubMed) from 2012 through September 30, 2022. Studies were included if they used real-world screening mammography examinations to validate AI algorithms for future risk prediction based on images alone or in combination with clinical risk factors.

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Sodium-glucose cotransporter 2 inhibitor (SGLT2i), a glucosuric agent initially approved for use as an antidiabetic agent, was unexpectedly found to confer cardio-and reno-protective effects in individuals with or without type 2 diabetes mellitus. Despite mounting evidence suggesting that SGLT2i provides cardio- and reno-protective benefits in both diabetic and non-diabetic and in chronic kidney disease (CKD) patients in the general population, reservations for its use in the transplant setting persist due to concerns for increased risk of genital mycotic and urinary tract infections. A comprehensive review of the literature on the efficacy and safety of SGLT2i use in diabetic kidney transplant recipients is herein presented followed by authors' opinion on its optimal use in this patient population.

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Preclinical MRI studies have been utilized for the discovery of biomarkers that predict post-traumatic epilepsy (PTE). However, these single site studies often lack statistical power due to limited and homogeneous datasets. Therefore, multisite studies, such as the Epilepsy Bioinformatics Study for Antiepileptogenic Therapy (EpiBioS4Rx), are developed to create large, heterogeneous datasets that can lead to more statistically significant results.

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Comprehensive tissue deconvolution of cell-free DNA by deep learning for disease diagnosis and monitoring.

Proc Natl Acad Sci U S A

July 2023

Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA 90095.

Article Synopsis
  • Plasma cell-free DNA (cfDNA) serves as a noninvasive biomarker for identifying cell death across different organs, which can help in detecting and monitoring diseases.
  • The study presents a comprehensive tissue methylation atlas created from 521 noncancer samples, identifying specific methylation patterns that aid in accurately determining the tissue origin of cfDNA.
  • A new deep-learning model called supervised tissue deconvolution is developed, which shows improved sensitivity and accuracy for analyzing cfDNA, with applications in disease diagnosis and tracking treatment effects.
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Background: The optimal timing of esophagogastroduodenoscopy (EGD) and the impact of clinico-demographic factors on hospitalization outcomes in non-variceal upper gastrointestinal bleeding (NVUGIB) remains an area of active research.

Aim: To identify independent predictors of outcomes in patients with NVUGIB, with a particular focus on EGD timing, anticoagulation (AC) status, and demographic features.

Methods: A retrospective analysis of adult patients with NVUGIB from 2009 to 2014 was performed using validated ICD-9 codes from the National Inpatient Sample database.

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Comparison of Right Colon Flat Polyp Detection Rate by Water Exchange Versus Water Immersion-pooled Results of Data File of 3 Published Reports.

J Clin Gastroenterol

February 2024

Gastroenterology, Sacramento VAMC, Veterans Affairs Northern California Healthcare System, Mather.

Goals: We tested the hypothesis that water exchange (WE) achieved a significantly higher right colon flat polyp detection rate (rFPDR) than water immersion (WI).

Background: Current endoscopy methods provide real-time morphology but not histopathology. Flat serrated polyps are difficult to find during colonoscopy.

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Alterations in the balance between skeletogenesis and adipogenesis is a pathogenic feature in multiple skeletal disorders. Clinically, enhanced bone marrow adiposity in bones impairs mobility and increases fracture risk, reducing the quality of life of patients. The molecular mechanism that underlies the balance between skeletogenesis and adipogenesis is not completely understood but alterations in skeletal progenitor cells' differentiation pathway plays a key role.

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Article Synopsis
  • - Previous studies indicated that bevacizumab, a treatment for metastatic colorectal carcinoma, may offer more significant benefits in males than in females, particularly regarding overall survival.
  • - Data from a large pool of 3369 patients showed that while bevacizumab improved overall survival for both males (2.3 months) and females (0.6 months), the benefit was notably limited in females under 60 years of age.
  • - The findings suggest that although bevacizumab enhances survival in mCRC patients, particularly in older females, the relatively minor benefits in younger females may prompt reconsideration of resource allocation in healthcare.
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Goals: The hypotheses that supervised trainees would provide a more favorable assessment of the learning experience and could achieve superior results with water exchange (WE) compared with air insufflation were tested.

Background: WE decreased pain, increased cecal intubation rate (CIR), and polyp detection rate (PDR).

Study: In a prospective pilot observational study, the trainees were taught WE in unsedated and WE and air insufflation in alternating order in sedated veterans.

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Longitudinal Retinal Changes in MOGAD.

Ann Neurol

September 2022

Institute of Clinical Neuroimmunology, Biomedical Center and University Hospital, Ludwig-Maximilians Universität München, Munich, Germany.

Objective: Patients with myelin oligodendrocyte glycoprotein antibody (MOG-IgG)-associated disease (MOGAD) suffer from severe optic neuritis (ON) leading to retinal neuro-axonal loss, which can be quantified by optical coherence tomography (OCT). We assessed whether ON-independent retinal atrophy can be detected in MOGAD.

Methods: Eighty patients with MOGAD and 139 healthy controls (HCs) were included.

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The Frank-Starling relationship is a fundamental concept in cardiovascular physiology, relating change in cardiac filling to its output. Historically, this relationship has been measured by physiologists and clinicians using invasive monitoring tools, relating right atrial pressure ( ) to stroke volume (SV) because the -SV slope has therapeutic implications. For example, a critically ill patient with a flattened -SV slope may have low yet fail to increase SV following additional cardiac filling (e.

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Osteogenesis imperfecta (OI) is a genetically heterogenous disorder most often due to heterozygosity for mutations in the type I procollagen genes, COL1A1 or COL1A2. The disorder is characterized by bone fragility leading to increased fracture incidence and long-bone deformities. Although multiple mechanisms underlie OI, endoplasmic reticulum (ER) stress as a cellular response to defective collagen trafficking is emerging as a contributor to OI pathogenesis.

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Autism Spectrum disorder (ASD) is a neurodevelopmental disorder characterized by impairments in social communication and social interaction, repetitive and stereotyped behaviors, and/or sensory aberrations. On the other hand, obsessive-compulsive disorder (OCD) is characterized by the presence of obsessions and/or compulsions. In consideration of these distinct pathologies, research suggests that anxiety disorders and OCD are highly prevalent in individuals with ASD.

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Subgroup and subtype-specific outcomes in adult medulloblastoma.

Acta Neuropathol

November 2021

Division of Haematology/Oncology, Hospital for Sick Children, 555 University Avenue, Toronto, ON, Canada.

Medulloblastoma, a common pediatric malignant central nervous system tumour, represent a small proportion of brain tumours in adults. Previously it has been shown that in adults, Sonic Hedgehog (SHH)-activated tumours predominate, with Wingless-type (WNT) and Group 4 being less common, but molecular risk stratification remains a challenge. We performed an integrated analysis consisting of genome-wide methylation profiling, copy number profiling, somatic nucleotide variants and correlation of clinical variables across a cohort of 191 adult medulloblastoma cases identified through the Medulloblastoma Advanced Genomics International Consortium.

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Unlabelled: To (1) describe the level of hope, optimism, and gratitude in a sample of minority health professional college students. (2) To examine the association between hope, optimism, and gratitude with wellbeing domains.

Participants: One hundred and thirty-two ( = 132) college students from the Nursing, Medicine, and Allied Health programs.

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