Publications by authors named "Chris Longenecker"

Article Synopsis
  • Findings indicate that higher cumulative HIV viral load (VL) and lower CD4 cell counts are significantly linked to an increased risk of developing venous thromboembolism (VTE) in people living with HIV (PWH).
  • A study involving over 21,000 PWH over nearly five years revealed that those with higher cumulative VL had a 45% increased risk of VTE compared to those with lower VL. Additionally, a CD4 count below 100 cells/mm³ was associated with a fourfold increase in risk.
  • The research suggests that managing HIV viral load and maintaining CD4 levels could be crucial strategies to lower the risk of VTE in PWH.
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Background: Despite improvements to the cascade of HIV care in East Africa, access to care for non-communicable disease co-morbidities like hypertension (HTN) remains a persistent problem. The integration of care for these conditions presents an opportunity to achieve efficiencies in delivery as well as decrease overall costs for patients. This study aims to build evidence on the burden of current out-of-pocket costs of care among HIV-HTN co-morbid patients.

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Background: Adults with congenital heart disease (ACHD) are at risk for lower quality of life (QOL) and psychological health. Behavioral interventions to meet their psychosocial needs are lacking. The aim of this study is to evaluate the feasibility of implementing the Promoting Resilience in Stress Management (PRISM) intervention in ACHD and its efficacy in increasing resilience in this population.

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Background: There is an unmet surgical burden among people living with rheumatic heart disease (RHD) in Uganda. Nevertheless, risk factors associated with time to first intervention and preoperative mortality are poorly understood.

Methods: Individuals with RHD who met indications for valve surgery were identified using the Uganda National RHD Registry (January 2010-August 2022).

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Article Synopsis
  • The study investigates physical activity levels in people living with HIV (PLHIV) and those without HIV (PWOH) in Uganda, focusing on its relationship with coronary artery disease (CAD) as detected by computed tomography.
  • Researchers analyzed data from 168 participants, revealing that males engaged in more moderate-to-vigorous physical activity than females, although overall activity levels were low for both groups compared to recommended guidelines.
  • After considering age and sex, the study found no significant link between physical activity and the presence of CAD, suggesting that other factors may contribute to cardiovascular disease risk in this population.
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The increased incidence of chronic diseases among people with HIV (PWH) is poised to increase the need for specialty care outside of HIV treatment settings. To reduce outcome disparities for HIV-associated comorbidities in the United States, it is critical to optimize access to and the quality of specialty care for underrepresented racial and ethnic minority (URM) individuals with HIV. We explored the experiences of URM individuals with HIV and other comorbidities in the specialty care setting during their initial and follow-up appointments.

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Background: Adult congenital heart disease (ACHD) can negatively impact quality of life (QOL). Strengthening resilience may improve this and other psychosocial outcomes important for living a meaningful life.

Objectives: The purpose of this study was to describe resilience and key psychosocial health outcomes in ACHD and evaluate the associations between resilience and these outcomes.

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Background: People with HIV (PWH) have lower exercise capacity than peers without HIV, which may be explained by chronotropic incompetence, the inability to increase heart rate during exercise.

Methods: The Exercise for Healthy Aging Study included adults aged 50 to 75 years with and without HIV. Participants completed 12 weeks of moderate-intensity exercise, before randomization to moderate or high intensity for 12 additional weeks.

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Obesity is a recognized public health epidemic with a prevalence that continues to increase dramatically in nearly all populations, impeding progress in reducing incidence rates of cardiovascular disease. Over the past decade, obesity science has evolved to improve knowledge of its multifactorial causes, identifying important biological causes and sociological determinants of obesity. Treatments for obesity have also continued to develop, with more evidence-based programs for lifestyle modification, new pharmacotherapies, and robust data to support bariatric surgery.

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Background: Atrial fibrillation (AF) is a common complication of rheumatic heart disease (RHD) and is challenging to treat in lower-resourced settings in which RHD remains endemic.

Objective: We characterized demographics, treatment outcomes, and factors leading to care retention for participants with RHD and AF in Uganda.

Methods: We conducted a retrospective analysis of the Uganda national RHD registry between June 2009 and May 2018.

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Background: Health-related quality of life (HRQOL) is a critical issue for patients undergoing surgery for congenital heart disease (CHD) but has never been assessed in a low-income country. We conducted a cross-sectional mixed methods study with age-matched healthy siblings serving as controls at the Uganda Heart Institute.

Methods: One-hundred fifteen CHD pediatric and young adult patients and sibling control participants were recruited.

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In this cohort study, we determined time to blood pressure (BP) control and its predictors among hypertensive PLHIV enrolled in integrated hypertension-HIV care based on the World Health Organization (WHO) HEARTS strategy at Mulago Immunosuppression Clinic in Uganda. From August 2019 to March 2020, we enrolled hypertensive PLHIV aged 18 years and initiated Amlodipine 5 mg mono-therapy for BP (140-159)/(90-99) mmHg or Amlodipine 5 mg/Valsartan 80 mg duo-therapy for BP ≥ 160/90 mmHg. Patients were followed with a treatment escalation plan until BP control, defined as BP < 140/90 mmHg.

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Introduction: The association of physical activity (PA) with subclinical cardiovascular disease (CVD) is unclear. Clarifying this relationship may inform cardiovascular prevention strategies.

Methods: We performed a systematic review (CRD42021226089) using Medline, Embase, CINAHL and Cochrane (1 January 2000 to 1 September 2023).

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Background: Heart failure disproportionately affects individuals residing in rural areas, leading to worse health outcomes. Digital health interventions have been proposed as a promising approach for improving heart failure management. This systematic review aims to identify randomized trials of digital health interventions for individuals living in underserved rural areas with heart failure.

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Cardiovascular diseases (CVDs) remain the leading cause of death and disability worldwide. Digital health technologies are important public health interventions for addressing the burden of cardiovascular disease. In this article, we discuss the importance of translating digital innovations in research-funded projects to low-resource settings globally to advance global cardiovascular health equity.

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Inequities in global health research are well documented. For example, training opportunities for US investigators to conduct research in low-income and middle-income countries (LMIC) have exceeded opportunities for LMIC investigators to train and conduct research in high-income countries. Reciprocal innovation addresses these inequities through collaborative research across diverse global settings.

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Background: Chronic valvular heart disease is a well-known, long-term complication of acute rheumatic fever (ARF), which remains a major public health problem in low- and middle-income countries. Access to surgical management remains limited. Outcomes of the minority proportion of patients that access surgery have not been described in Uganda.

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Background: People with HIV (PWH) have lower exercise capacity compared to HIV-uninfected peers, which may be explained by chronotropic incompetence (CI), the inability to increase heart rate during exercise.

Methods: The Exercise for Healthy Aging Study included adults ages 50-75 with and without HIV. Participants completed 12 weeks of moderate intensity exercise, before randomization to moderate or high intensity for 12 additional weeks.

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Objective: Most rheumatic heart disease (RHD) registries are static and centralized, collecting epidemiological and clinical data without providing tools to improve care. We developed a dynamic cloud-based RHD case management application with the goal of improving care for patients with RHD in Uganda.

Methods: The Active Community Case Management Tool (ACT) was designed to improve community-based case management for chronic disease, with RHD as the first test case.

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Article Synopsis
  • A study in Uganda is set to evaluate a decentralized care approach for RHD using a digital application to enhance SAP adherence compared to traditional centralized methods, involving 150-200 patients from local health centers.
  • The research has ethical approval and emphasizes voluntary participation, aiming to identify barriers and facilitators in the decentralized care model to improve its integration into the public healthcare system.
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