Publications by authors named "Bloomfield G"

Introduction: Carcinoembryonic antigen (CEA) level is currently being used in algorithms of commercially available pancreatic cyst fluid analysis platforms. However, the evidence to date on its role in risk stratification for mucinous lesions is heterogenous. We therefore sought to examine the relationship between the magnitude of CEA elevation and the structural and molecular properties of pancreatic cysts.

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Background: People with HIV (PWH) have elevated cardiovascular risk. Underrepresented racial and ethnic groups in the southern United States are disproportionately affected, yet whether cardiology care for this at-risk group improves blood pressure and lipid control or prevents cardiovascular events is unknown.

Methods And Results: We evaluated a cohort of PWH from underrepresented racial and ethnic groups who received HIV-related care at 4 centers in the southern United States during 2015 to 2018 with follow-up through 2020.

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Background: Risk estimation is an essential component of cardiovascular disease prevention among people with HIV. We aimed to characterise how well atherosclerotic cardiovascular disease (ASCVD) risk scores used in clinical guidelines perform among people with HIV globally.

Methods: In this prospective cohort study leveraging REPRIEVE data, we included participants aged 40-75 years, with low-to-moderate traditional cardiovascular risk, not taking statin therapy.

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This state-of-the-art review examines disparities in the diagnosis, management, and outcomes of cardiac arrhythmias globally. These arrhythmias include atrial fibrillation, ventricular tachyarrhythmias underlying sudden cardiac death, and bradyarrhythmias associated with sinus node and atrioventricular node disease. Arrhythmias in low- and middle-income countries often result in higher mortality rates due to complex and poorly documented risk factors, lack of clinical expertise among health care personnel, lack of sufficient infrastructure, and challenges in access to care.

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Background: Patients with abnormal (positive) exercise electrocardiography, but normal stress echocardiography (+ECG/-Echo), have an increased risk of adverse cardiovascular events compared with patients with a normal (negative) ECG and a normal stress Echo (-ECG/-Echo). However, it is unclear if +ECG/-Echo discordance is associated with a greater burden of subclinical coronary atherosclerosis.

Methods: Project Baseline Health Study participants who underwent a stress Echo and coronary artery calcium (CAC) scan were stratified by stress Echo result: -ECG/-Echo or +ECG/-Echo.

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Background: Preliminary data suggests that the burden of acute coronary syndrome (ACS) is high in Tanzania. After efforts to improve ACS care, we sought to describe ACS diagnosis rates, care processes, and outcomes in a Tanzanian Emergency Department (ED).

Methods: Adults presenting to a northern Tanzanian ED with acute chest pain or shortness of breath were enrolled from November 2020 to January 2023.

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Background: Tobacco consumption poses a significant challenge to global health and contributes to the increase in noncommunicable diseases and premature deaths.

Aim: To investigate the potential impact of a 70% tobacco tax on consumption and government revenue in Pakistan.

Methods: We analysed secondary data from 2011 to 2022 (after imposition of a 70% excise tax) from the Pakistan Bureau of Statistics, Pakistan Social and Living Standard Survey, financial yearbooks and Federal Board of Revenue reports for tobacco consumption and government revenue.

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Background: In Tanzania, acute myocardial infarction (AMI) is under-diagnosed, and uptake of evidence-based care is sub-optimal. Using an implementation science approach, an intervention was developed to address local barriers to care: the Multicomponent Intervention for Improving Myocardial Infarction Care in Tanzania (MIMIC).

Methods: This single-arm pre-post trial was conducted in a northern Tanzanian emergency department (ED).

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Importance: In a mechanistic substudy of the Randomized Trial to Prevent Vascular Events in HIV (REPRIEVE) randomized clinical trial, pitavastatin reduced noncalcified plaque (NCP) volume, but specific protein and gene pathways contributing to changes in coronary plaque remain unknown.

Objective: To use targeted discovery proteomics and transcriptomics approaches to interrogate biological pathways beyond low-density lipoprotein cholesterol (LDL-C), relating statin outcomes to reduce NCP volume and promote plaque stabilization among people with HIV (PWH).

Design, Setting, And Participants: This was a post hoc analysis of the double-blind, placebo-controlled, REPRIEVE randomized clinical trial.

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Background: Nonspecific electrocardiogram (ECG) findings are associated with increased morbidity and mortality in high-income settings. ECGs are increasingly available in emergency departments (EDs) in low- and middle-income countries (LMICs), however the prognostic value of nonspecific ECG findings in resource-limited settings, particularly in sub-Saharan Africa, remains unclear.

Objective: To assess the association between nonspecific ECG findings and 30-day mortality among patients presenting with chest pain and shortness of breath to a Tanzanian ED.

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Introduction: The diagnosis of choledochal cysts in the adult population is complicated by the expected physiologic dilation of the common bile duct after cholecystectomy. We aimed to compare patients who underwent choledochal cyst resection based on cholecystectomy status.

Methods: A retrospective analysis was conducted of patients who underwent choledochal cyst resection between 1/1/1998-12/31/2021.

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Article Synopsis
  • - The research paper analyzes a capacity-strengthening workshop aimed at improving grant administration skills in Pakistani academic institutions, addressing the challenges caused by insufficient training and resources.
  • - A pre and post-survey was conducted to evaluate participant knowledge, showing significant improvement in Islamabad, where support services are weaker, compared to Karachi.
  • - The findings emphasize the success of interactive and inclusive learning methods in enhancing grant knowledge, highlighting the importance of collaborative learning for building a stronger research environment in Pakistan.
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Effective antiretroviral therapy (ART) is now nearly ubiquitous. However, the survival benefits conferred with ART contribute to an aging human immunodeficiency virus (HIV) population and increased risk of chronic diseases, like atherosclerotic cardiovascular disease (ASCVD). Furthermore, HIV is a known risk enhancer of ASCVD and acknowledged as such in the current 2018 AHA/ACC Blood Cholesterol guidelines [1].

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Article Synopsis
  • The study aimed to evaluate how clinically significant weight loss (CSWL) affects postoperative complications after abdominal wall reconstruction using the component separation technique (CST).
  • A review of 180 patients undergoing ventral hernia repair showed that 22.2% achieved CSWL, with this group having a higher body mass index (BMI) and obesity rates compared to those who didn't.
  • Results indicated that complications such as surgical site issues and readmissions were similar in both CSWL and non-CSWL groups, suggesting that higher BMI at the time of surgery is a more critical factor for complications than previous weight loss.
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  • A study on the effects of statin therapy in people living with HIV (PWH) found that while it did not reduce the overall incidence of COVID-19, it may lower the risk of severe cases of COVID-19 before vaccination.
  • The study analyzed data from 6,905 PWH and included variables such as age, gender, and race, showing that a majority had received COVID-19 vaccinations by the end of the study period.
  • Statin therapy demonstrated a potential protective effect against serious COVID-19 cases, as evidenced by a hazard ratio of 0.75, but the results were inconclusive due to fewer cases than expected.
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Article Synopsis
  • REPRIEVE was a study that looked at how a medication called pitavastatin affects people with HIV and their risk of getting diabetes.
  • The study included over 7,700 participants aged 40 to 75 who didn't have diabetes at the start.
  • It found that people with more diabetes risk factors had a greater chance of developing diabetes, especially in places like South Asia.
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Background: Sleeve gastrectomy to Roux-en-Y bypass conversion is a commonly performed procedure, yet data are limited on outcomes and their predictors. The purpose of this study is to characterize the long-term outcomes of patients after sleeve-to-bypass conversion and identify predictors of post-conversion outcomes.

Methods: We performed a retrospective cohort study of patients who underwent sleeve-to-bypass conversion for obesity across four hospitals from 06/2017 to 04/2023.

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Background: Anomalous coronary arteries (ACA) are seen in 1-5 % of patients undergoing coronary angiography, and their presence may increase procedural difficulty. We aimed to compare procedural outcomes of coronary angiography in ACA patients by anatomy and prior knowledge of the ACA.

Methods: This was a single-center review of ACA patients undergoing coronary angiography between October 2013 and February 2022.

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Background: Although the incidence of acute myocardial infarction (AMI) is rising in sub-Saharan Africa, the uptake of evidence-based care for the diagnosis and treatment of AMI is limited throughout the region. In Tanzania, studies have revealed common misdiagnosis of AMI, infrequent administration of aspirin, and high short-term mortality rates following AMI.

Objective: This study aims to evaluate the implementation and efficacy outcomes of an intervention, the Multicomponent Intervention to Improve Acute Myocardial Infarction Care (MIMIC), which was developed to improve the delivery of evidence-based AMI care in Tanzania.

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Background: Coronary plaque is common among people with HIV (PWH) with low-to-moderate traditional atherosclerotic cardiovascular disease (ASCVD) risk.

Objectives: The purpose of this study was to determine the association of high-sensitivity cardiac troponin T (hs-cTnT) levels with coronary plaque characteristics and evaluate if hs-cTnT improves identification of these features beyond traditional ASCVD risk factors among PWH.

Methods: Among PWH receiving stable antiretroviral therapy with low-to-moderate ASCVD risk and no known history of ASCVD, hs-cTnT levels and measures of plaque by coronary computed tomography angiography were assessed.

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Background: Hypertension is a leading risk factor for cardiovascular disease among patients living with HIV (PLWH). Understanding the predictors and patterns of antihypertensive medication prescription and blood pressure (BP) control among PLWH with hypertension (HTN) is important to improve the primary prevention efforts for this high-risk population. We sought to assess important patient-level correlates (eg, race) and inter-facility variations in antihypertension medication prescriptions and BP control among Veterans living with HIV (VLWH) and HTN.

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Background: Little is known about the potential benefits or harms of statins on physical function among people with human immunodeficiency virus (PWH).

Methods: REPRIEVE was a double-blind randomized controlled trial evaluating pitavastatin for primary prevention of major adverse cardiovascular events in PWH. Time to complete 10 chair rises, 4-m gait speed, grip strength, and a modified short physical performance test were assessed annually for up to 5 years in the ancillary study PREPARE and analyzed using linear mixed models.

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