Publications by authors named "Pellegrini D"

Structural health monitoring (SHM) is essential for preserving historical and modern infrastructure by tracking dynamic properties such as frequencies and mode shapes. Changes in these properties can indicate structural damage, but environmental factors like temperature can also cause similar variations, complicating damage detection. This study investigates from an experimental point of view the effect of temperature on the dynamic behaviour of masonry structures, focusing on a masonry wall subjected to thermal load variations within operational conditions.

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Background: A substantial number of patients with severe aortic stenosis (AS) undergoing transcatheter aortic valve implantation (TAVI) experience adverse events after TAVI, with health care expenditure. We aimed to investigate cardiac remodeling and long-term outcomes in diabetic patients with severe AS, left ventricular ejection fraction (LVEF) < 50%, and extra-valvular cardiac damage (EVCD) undergoing TAVI treated with sodium-glucose cotransporter-2 inhibitors (SGLT2i) versus other glucose-lowering strategies (no-SGLT2i users).

Methods: Multicenter international registry of consecutive diabetic patients with severe AS, LVEF < 50%, and EVCD undergoing TAVI.

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Article Synopsis
  • Balloon-expandable valves (BEVs) and self-expanding valves (SEVs) are compared for their effects on patients with Sievers type 1 bicuspid aortic valve (BAV) stenosis undergoing transcatheter aortic valve replacement.
  • The analysis, based on a registry of 955 patients, found no significant difference in midterm major adverse events or technical success between BEVs and SEVs after adjusting for baseline differences.
  • However, BEVs had lower risks of new permanent pacemaker implantation and moderate or greater paravalvular regurgitation, but a higher risk of severe patient-prosthesis mismatch compared to SEVs.
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  • - Balloon aortic valvuloplasty (BAV) is a procedure used for patients with severe aortic valve stenosis, either as preparation for trans-catheter aortic valve replacement (TAVR) or alone in certain cases; the study focused on the newly available Mammoth balloon catheter (BC) used in this context.
  • - A retrospective analysis was conducted on patients treated with the Mammoth BC at a hospital in Milan, where technical success was defined by the ability to successfully deploy and inflate the catheter without significant complications like injury or stroke.
  • - The results showed a 100% technical success rate in 121 procedures with no complications attributed to the Mammoth BC; however, some patients in the stand-alone group
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  • * A study in Rio Grande do Sul, Brazil, revealed that 98% of cattle farms had ticks resistant to multiple acaricides, with 71% of samples resistant to all six tested compounds.
  • * Factors such as the use of injectable acaricides, frequent treatments, and larger herd sizes were linked to increased resistance rates, indicating a serious challenge for effective tick management.
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  • * Histological analysis shows these lesions are made up of distinct columns of abnormal keratin on a thin outer skin layer, and sporadic cases may be linked to chronic illnesses or cancers.
  • * A case study describes an elderly man with liver cirrhosis and cancer who experienced a remission of skin lesions two months after a liver transplant, suggesting the condition may relate to his cancer diagnosis.
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Objective: to analyze the frequency and associated risk factors for COVID-19 infection and the availability of Personal Protective Equipment used by primary healthcare workers.

Method: a cross-sectional study was conducted over six months in Rio Grande do Sul. Descriptive analysis was performed, with the comparison of independent samples using Pearson's Chi-square test and Fisher's Exact test (p<.

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In at least one-half of the patients with angina or ischemia and nonobstructive coronary arteries undergoing coronary function testing, coronary artery spasm (CAS) is detected. CAS is associated with an adverse prognosis regarding recurrent complaints and ischemic events. Current treatment options are mainly focused on the complaints, not on the underlying pathophysiological process.

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The space-charge field of a relativistic charged bunch propagating in plasma is screened due to the presence of mobile charge carriers. We experimentally investigate such screening by measuring the effect of dielectric wakefields driven by the bunch in a uncoated dielectric capillary where the plasma is confined. We show that the plasma screens the space-charge field and therefore suppresses the dielectric wakefields when the distance between the bunch and the dielectric surface is much larger than the plasma skin depth.

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Introduction: Over the past two decades, transcatheter aortic valve replacement (TAVR) has expanded its application across all surgical risk levels, including low-risk patients, where, due to longer life expectancy, reducing common pitfalls of TAVR is essential. To address these needs, many technological advancements have been developed. Myval and the new generation Myval Octacor (Meril Life Sciences Pvt.

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Introduction: Drug-coated balloon (DCB) is an established treatment option for in-stent restenosis and small vessel, de novo, coronary artery disease (CAD). Although the use of this tool is increasing in everyday practice, data regarding performance in the treatment of de novo, large vessel CAD (LV-CAD) is still lacking. A systematic review and meta-analysis were conducted to evaluate the efficacy and safety of DCB versus drug-eluting stent (DES) in this setting.

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The optimal timing to perform percutaneous coronary interventions (PCIs) in patients undergoing transcatheter aortic valve replacement (TAVR) is not well established. In this meta-analysis, we aimed to compare the outcomes of patients undergoing PCI before versus after TAVR. A comprehensive literature search was performed including Medline, Embase, and Cochrane electronic databases up to 5 April 2024 for studies that compared PCI before and after TAVR reporting at least one clinical outcome of interest (PROSPERO ID: CRD42023470417).

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Article Synopsis
  • - Plasma wakefield acceleration is a groundbreaking technique that can rapidly boost particle beam energies to gigaelectronvolts in very short distances, making it potential for compact applications like free-electron lasers.
  • - Despite the reduced size of the plasma accelerator, traditional magnetic optics are still used before and after the process, which require larger setups.
  • - The research introduces a compact device featuring two active-plasma lenses, which enhances focusing and energy gain of particle beams, aiding in the miniaturization of accelerators for future, smaller-scale machinery.
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We present a new approach that demonstrates the deflection and guiding of relativistic electron beams over curved paths by means of the magnetic field generated in a plasma-discharge capillary. We experimentally prove that the guiding is much less affected by the beam chromatic dispersion with respect to a conventional bending magnet and, with the support of numerical simulations, we show that it can even be made dispersionless by employing larger discharge currents. This proof-of-principle experiment extends the use of plasma-based devices, that revolutionized the field of particle accelerators enabling the generation of GeV beams in few centimeters.

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Bovine anaplasmosis presents a significant challenge to livestock production in tropical, subtropical, and temperate regions. For many years, the concept of enzootic stability/instability (initially established for babesiosis) and herd seroprevalence as an indicator of outbreak risks have been applied to anaplasmosis. However, this model has never been definitively validated for Anaplasma marginale.

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Immune checkpoint inhibitors (ICIs) are monoclonal antibodies that are increasingly used in cancer treatments. As experience in the use of immunotherapy increases, more is known about its safety profile and immune-mediated adverse effects. Among them is diabetic ketoacidosis (DKA), a rare but serious fatal complication of treatment.

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Background: The new balloon-expandable (BE) Myval transcatheter heart valves (THV) has shown promising early results with low paravalvular leak (PVL) and permanent pacemaker implantation (PPI) rates. Limited data are available regarding its long-term performance. We aimed to compare the 2-year clinical and echocardiographic outcomes of transcatheter aortic valve replacement (TAVR) using the self-expanding (SE) Evolut R and the BE Myval THVs.

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Introduction: Therapeutic reasoning focuses on the decisions related to patient disposition and management. This is in contrast to diagnostic reasoning, which is the focus of much of the current discourse in the medical literature. Few studies relate to therapeutic reasoning, and even fewer relate to the rural and remote context.

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Background: Inflammatory bowel diseases (IBD) incidence and prevalence in Latin America have experienced a significant shift in the last decades. There is paucity of IBD epidemiologic data in Argentina.

Aim: To determine the incidence and prevalence of IBD between 2018 and 2022 of a population from the city of Buenos Aires.

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Stiff-person syndrome is a rare neurological condition characterized by muscular rigidity of the trunk and extremities and muscle spasms triggered by sensory or emotional stimuli, which progresses towards prostration. It has a pathophysiogenic mechanism with an immunological basis, in which autoantibodies, such as antiGAD65, play a central role. Likewise, the detection of these antibodies corroborates the diagnosis in a patient with a suggestive clinical picture.

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