Publications by authors named "Ubaldo Hernandez"

Background: Limited data exists about treatment outcomes in nationwide hepatitis C virus (HCV) elimination programs where injection drug use (IDU) is the main mode of transmission. In 2016 Iceland initiated the HCV elimination program known as Treatment as Prevention for Hepatitis C (TraP HepC). Factors associated with HCV cure in this population are examined.

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Introduction: Increasing evidence indicates an association between nutritional status and Coronavirus disease 2019 (COVID-19) disease severity. The aim of the study was to describe the risk of malnutrition, body mass index (BMI) and vitamin D status of hospitalised COVID-19 patients and assess whether they are associated with duration of hospital stay, intensive care unit (ICU) admission, mechanical ventilation, and mortality.

Methods: The study is a descriptive retrospective study of 273 patients with COVID-19 admitted to Hospital from February 2020 to March 2021.

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Article Synopsis
  • This study aimed to assess the outcomes of patients with aortic stenosis undergoing transcatheter aortic valve replacement (TAVR) using the 34 mm Evolut R valve.
  • It was found that while this valve had a device success rate of 87.4%, it also led to a higher rate of permanent pacemaker implantation (22.4%) compared to other valve sizes.
  • Overall, the 34 mm Evolut R performed similarly to other valve sizes in terms of device success, indicating its effectiveness despite the increased pacemaker requirement.
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Background: The Treatment as Prevention for Hepatitis C program started in 2016 in Iceland, offering treatment with direct-acting antivirals to hepatitis C virus (HCV)-infected individuals. Reinfections through injection drug use (IDU) can hamper elimination efforts. We determined reinfection rates of HCV among patients in the program.

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Article Synopsis
  • Intracoronary imaging techniques are effective in identifying atherosclerotic plaques, particularly in patients with acute coronary syndrome (ACS), highlighting that plaque erosion is a common issue alongside plaque rupture.
  • A case study of a 45-year-old man with a history of smoking and cocaine use showed ST-segment elevation myocardial infarction (STEMI) due to thrombotic occlusion, but optical coherence tomography revealed an eroded plaque treatable through conservative management.
  • Young patients with risk factors like smoking and drug use often experience STEMI from eroded plaques, and using imaging technology can lead to accurate diagnoses and tailored treatments without the need for stents.
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Background: WHO has set targets to eliminate hepatitis C virus (HCV) infection as a global health threat by 2030 through a 65% reduction in HCV-related deaths and 80% reduction in HCV incidence. To achieve these goals, WHO set service coverage targets of 90% of the infected population being diagnosed and 80% of eligible patients being treated. In February, 2016, Iceland initiated a nationwide HCV elimination programme known as treatment as prevention for hepatitis C (TraP HepC), which aimed to maximise diagnosis and treatment access.

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Objectives: The objective was to evaluate the results of valve-in-valve procedures performed with the Allegra device.

Background: Transcatheter aortic valve implantation to treat degenerated biological aortic valves (valve-in-valve) is an established procedure in most catheterization laboratories, but the results are poorer than procedures done in native aortic stenosis. The Allegra device (Biosensors, Morges, Switzerland) has an excellent design to treat these patients.

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Background & Aims: In Iceland a nationwide program has been launched offering direct-acting antiviral (DAA) treatment for everyone living with hepatitis C virus (HCV). We estimate (i) the time and treatment scale-up required to achieve the World Health Organization's HCV elimination target of an 80% reduction in incidence; and (ii) the ongoing frequency of HCV testing and harm reduction coverage among people who inject drugs (PWID) required to minimize the likelihood of future HCV outbreaks occurring.

Methods: We used a dynamic compartmental model of HCV transmission, liver disease progression and the HCV cascade of care, calibrated to reproduce the epidemic of HCV in Iceland.

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Predation is a powerful agent in the ecology and evolution of predator and prey. Prey may select multiple habitats whereby different genotypes prefer different habitats. If the predator is also habitat-specific the prey may evolve different habitat occupancy.

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