Experiencia inicial con la prótesis de despliegue rápido en posición aórtica Edwards Intuity

ResumenObjetivoDisponemos de una nueva clase de prótesis aórticas de despliegue rápido para tratamiento quirúrgico de la estenosis aórtica. Permitirían disminuir los tiempos quirúrgicos y facilitarían la cirugía mínimamente invasiva. Presentamos nuestra experiencia inicial con la válvula Edwards Intuity en el contexto del estudio multicéntrico Foundation.Pacientes y métodosEntre septiembre de 2012 y febrero de 2014 se implantaron 25 prótesis aórticas Edwards Intuity en 26 pacientes (77±4,3años; 52% varones). Veinticuatro (96%) fueron reemplazo valvular aislado, y 9 pacientes (36%) tuvieron abordaje mínimamente invasivo. Los pacientes fueron estudiados al alta, a los 3meses y al año de la intervención.ResultadosHubo éxito en el implante en el 96,2% de los pacientes (25/26). No hubo mortalidad hospitalaria. Seguimiento medio de 11±5,4meses, supervivencia acumulada del 96%. Un paciente falleció a los 11meses por un ictus isquémico. El tiempo medio de pinzamiento aórtico fue de 38,2±10,1min y el tiempo medio de circulación extracorpórea, de 62,4±11,1min. A los 3meses, el área valvular efectiva media fue de 1,70±0,42cm2. El 91% de los pacientes (23/25) estaban en grado funcionali en el seguimiento.ConclusionesEl implante de la válvula Edwards Intuity para el tratamiento de la estenosis aórtica ha sido factible, seguro y eficaz. Los tiempos de isquemia miocárdica y de circulación extracorpórea parecen reducirse en comparación con la cirugía valvular aórtica habitual. El comportamiento hemodinámico inicial de la prótesis Edwards Intuity es excelente.AbstractObjectiveA new class of rapid deployment prostheses is now available for surgical treatment of aortic stenosis. These prostheses offer the possibility of reducing the duration of cardiopulmonary bypass and aortic clamping times, and facilitate the use of minimally invasive surgery. We present our initial experience with the Edwards Intuity valve in the context of a multicentre Foundation study.Patients and methodsBetween September 2012 and February 2014, 25 Edwards Intuity valves were implanted in 26 patients (77±4.3years; 52% male). Twenty-four (96%) were isolated aortic valve replacement; a minimally invasive approach was used on 9 patients (36%). Patients were studied at discharge, three months, and one year after surgery.ResultsImplantation success rate was 96.2% (25/26). There was no hospital mortality. Mean follow-up of 11±5.54months, cumulative survival of 96%. One patient died eleven months after surgery due to ischaemic stroke. The mean aortic clamping time was 38.2±10.1minutes, and the mean cardiopulmonary bypass (CPB) time was 62.4±11.1minutes. In the echocardiography at 3months, the mean effective valve area was 1.70±0.42cm2, and 91% of patients (23/25) were in functional classi NYHA at follow-up.ConclusionsThe implantation of the Edwards Intuity valve for surgical treatment of aortic stenosis has shown to be feasible, safe and effective. Times of myocardial ischaemia and extracorporeal circulation appear to be reduced compared with normal aortic valve surgery. The initial haemodynamic performance of the Edwards Intuity prosthesis is excellent

Cryo-EM and single-particle analysis with Scipion

Cryo-electron microscopy has become one of the most important tools in biological research to reveal the structural information of macromolecules at near-atomic resolution. In single-particle analysis, the vitrified sample is imaged by an electron beam and the detectors at the end of the microscope column produce movies of that sample. These movies contain thousands of images of identical particles in random orientations. The data need to go through an image processing workflow with multiple steps to obtain the final 3D reconstructed volume. The goal of the image processing workflow is to identify the acquisition parameters to be able to reconstruct the specimen under study. Scipion provides all the tools to create this workflow using several image processing packages in an integrative framework, also allowing the traceability of the results. In this article the whole image processing workflow in Scipion is presented and discussed with data coming from a real test case, giving all the details necessary to go from the movies obtained by the microscope to a high resolution final 3D reconstruction. Also, the power of using consensus tools that allow combining methods, and confirming results along every step of the workflow, improving the accuracy of the obtained results, is discussed

Initial experience with rapid deployment Edwards Intuity aortic valve

© 2015 Sociedad Española de Cirugía Torácica-Cardiovascular. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ This document is the Published version of a Published Work that appeared in final form in Cirugía Cardiovascular. To access the final edited and published work see https://doi.org/10.1016/j.circv.2015.07.008Objetivo Disponemos de una nueva clase de prótesis aórticas de despliegue rápido para tratamiento quirúrgico de la estenosis aórtica. Permitirían disminuir los tiempos quirúrgicos y facilitarían la cirugía mínimamente invasiva. Presentamos nuestra experiencia inicial con la válvula Edwards Intuity en el contexto del estudio multicéntrico Foundation. Pacientes y métodos Entre septiembre de 2012 y febrero de 2014 se implantaron 25 prótesis aórticas Edwards Intuity en 26 pacientes (77 ± 4,3 años; 52% varones). Veinticuatro (96%) fueron reemplazo valvular aislado, y 9 pacientes (36%) tuvieron abordaje mínimamente invasivo. Los pacientes fueron estudiados al alta, a los 3 meses y al año de la intervención. Resultados Hubo éxito en el implante en el 96,2% de los pacientes (25/26). No hubo mortalidad hospitalaria. Seguimiento medio de 11 ± 5,4 meses, supervivencia acumulada del 96%. Un paciente falleció a los 11 meses por un ictus isquémico. El tiempo medio de pinzamiento aórtico fue de 38,2 ± 10,1 min y el tiempo medio de circulación extracorpórea, de 62,4 ± 11,1 min. A los 3 meses, el área valvular efectiva media fue de 1,70 ± 0,42 cm2. El 91% de los pacientes (23/25) estaban en grado funcional i en el seguimiento. Conclusiones El implante de la válvula Edwards Intuity para el tratamiento de la estenosis aórtica ha sido factible, seguro y eficaz. Los tiempos de isquemia miocárdica y de circulación extracorpórea parecen reducirse en comparación con la cirugía valvular aórtica habitual. El comportamiento hemodinámico inicial de la prótesis Edwards Intuity es excelente.--------------Objective A new class of rapid deployment prostheses is now available for surgical treatment of aortic stenosis. These prostheses offer the possibility of reducing the duration of cardiopulmonary bypass and aortic clamping times, and facilitate the use of minimally invasive surgery. We present our initial experience with the Edwards Intuity valve in the context of a multicentre Foundation study. Patients and methods Between September 2012 and February 2014, 25 Edwards Intuity valves were implanted in 26 patients (77 ± 4.3 years; 52% male). Twenty-four (96%) were isolated aortic valve replacement; a minimally invasive approach was used on 9 patients (36%). Patients were studied at discharge, three months, and one year after surgery. Results Implantation success rate was 96.2% (25/26). There was no hospital mortality. Mean follow-up of 11 ± 5.54 months, cumulative survival of 96%. One patient died eleven months after surgery due to ischaemic stroke. The mean aortic clamping time was 38.2 ± 10.1 minutes, and the mean cardiopulmonary bypass (CPB) time was 62.4 ± 11.1 minutes. In the echocardiography at 3 months, the mean effective valve area was 1.70 ± 0.42 cm2, and 91% of patients (23/25) were in functional class i NYHA at follow-up. Conclusions The implantation of the Edwards Intuity valve for surgical treatment of aortic stenosis has shown to be feasible, safe and effective. Times of myocardial ischaemia and extracorporeal circulation appear to be reduced compared with normal aortic valve surgery. The initial haemodynamic performance of the Edwards Intuity prosthesis is excellent

Algorithmic robustness to preferred orientations in single particle analysis by CryoEM

The presence of preferred orientations in single particle analysis (SPA) by cryo-Electron Microscopy (cryoEM) is currently one of the hurdles preventing many structural analyses from yielding high-resolution structures. Although the existence of preferred orientations is mostly related to the grid preparation, in this technical note, we show that some image processing algorithms used for angular assignment and three-dimensional (3D) reconstruction are more robust than others to these detrimental conditions. We exemplify this argument with three different data sets in which the presence of preferred orientations hindered achieving a 3D reconstruction without artifacts or, even worse, a 3D reconstruction could never be achievedWe acknowledge support from “la Caixa” Foundation (Fellowship LCF/BQ/DI18/11660021. This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 713673. We also thank the financial support from the Spanish Ministry of Economy and Competitiveness through Grants BIO2016-76400-R(AEI/FEDER, UE) and SEV 2017-0712, the “Comunidad Autónoma de Madrid” through Grant: S2017/BMD-3817, Instituto de Salud Carlos III, PT17/ 0009/0010 (ISCIII-SGEFI/ERDF), European Union (EU) and Horizon 2020 through grants: CORBEL (INFRADEV-1-2014-1, Proposal: 654248), INSTRUCT-ULTRA (INFRADEV-03-2016-2017, Proposal: 731005), EOSC Life (INFRAEOSC-04-2018, Proposal: 824087), High- ResCells (ERC-2018-SyG, Proposal: 810057), IMpaCT (WIDESPREAD-03-2018 – Proposal: 857203), EOSC-Synergy (EINFRA-EOSC-5, Proposal: 857647), and iNEXT-Discovery (Proposal: 871037). The authors acknowledge the support and the use of resources of Instruct, a Landmark ESFRI projec

Seven years experience with rapid deployment Edwards Intuity aortic prosthesis

© 2020 Sociedad Española de Cirugía Cardiovascular y Endovascular. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ This document is the Published version of a Published Work that appeared in final form in Cirugía Cardiovascular. To access the final edited and published work see https://doi.org/10.1016/j.circv.2020.08.002Introducción Las prótesis aorticas de rápido despliegue aparecieron hace 10 años para tratar la estenosis aórtica. El sistema de válvula Edwards Intuity es una prótesis biológica basada en la válvula Edwards Magna con un marco infraanular. Presentamos los resultados clínicos y hemodinámicos a corto y largo plazo obtenidos con esta prótesis biológica. Métodos Ciento diecisiete pacientes (65% varones, 75 ± 4,5 años) con estenosis aórtica (gradiente medio preoperatorio de 49,6 ± 12 mm Hg) recibieron una prótesis Edwards Intuity entre septiembre de 2012 y diciembre de 2019. Se incluyeron en una base de datos prospectiva que recogía diferentes variables. La media de seguimiento fue de 36 ± 21 meses. Resultados Mortalidad hospitalaria del 3,4%, supervivencia al año, a los 3 y 6 años del 95%, 90% y 81%, respectivamente. Se utilizó hemiesternotomía media superior en 78 pacientes (67%). La mediana de tiempos de isquemia miocárdica y de circulación extracorpórea de toda la serie fueron 40 (33-50) minutos y 59 (48-73) minutos. Gradientes medios al alta, al año y a los 2 años fueron 10 ± 4 mm, 9 ± 3,5 mm y 8,4 ± 3,4 mm Hg. Ocho pacientes (7%) necesitaron marcapasos en el postoperatorio. Dos pacientes (0,6%) se reintervinieron en seguimiento por endocarditis y otro (0,3%) se reintervino por fuga periprotésica. Conclusión El sistema de válvula Edwards Intuity presenta buenos resultados clínicos y hemodinámicos a corto y largo plazo. Estas prótesis aórticas se pueden considerar una alternativa a las prótesis convencionales, sobre todo en cirugía de mínimo acceso y en intervenciones complejas.----------------Introduction Rapid deployment aortic valves appeared ten years ago to treat aortic stenosis. The Edwards Intuity Valve System is a biological prosthesis based on the Edwards Magna valve with an infra-annular framework. We present the short and long-term clinical and hemodynamic results obtained with this biological prosthesis. Methods One hundred seventeen patients (65% male, 75 ± 4.5 years) with aortic stenosis (mean preoperative gradient of 49.6 ± 12 mm Hg) received an Edwards Intutiy prosthesis between September 2012 and December 2019. They were included in a prospective data base that collected different variables. The mean follow-up was 36 ± 21 months. Results Hospital mortality of 3.4%. Survival at one, three and six years of 95%, 90% and 81%, respectively. Upper hemisternotomy was used in 78 patients (67%). The median times of myocardial ischemia and extracorporeal circulation for the entire series were 40 (33-50) minutes and 59 (48-73) minutes. Average gradients at discharge, one year and two years were 10 ± 4 mm, 9 ± 3.5 mm and 8.4 ± 3.4 mm Hg. Eight patients (7%) required pacemakers in the postoperative period. Two patients (0.6%) underwent surgery for endocarditis and another (0.3%) underwent surgery for periprosthetic leak. Conclusion The Edwards Intutiy valve system presents good short and long term clinical and hemodynamic results. These aortic prostheses can be considered an alternative to conventional prostheses, especially in minimal access surgery and in complex interventions

7th Drug hypersensitivity meeting: part two

No abstract availabl

Role of age and comorbidities in mortality of patients with infective endocarditis

[Purpose]: The aim of this study was to analyse the characteristics of patients with IE in three groups of age and to assess the ability of age and the Charlson Comorbidity Index (CCI) to predict mortality. [Methods]: Prospective cohort study of all patients with IE included in the GAMES Spanish database between 2008 and 2015.Patients were stratified into three age groups:<65 years,65 to 80 years,and ≥ 80 years.The area under the receiver-operating characteristic (AUROC) curve was calculated to quantify the diagnostic accuracy of the CCI to predict mortality risk. [Results]: A total of 3120 patients with IE (1327 < 65 years;1291 65-80 years;502 ≥ 80 years) were enrolled.Fever and heart failure were the most common presentations of IE, with no differences among age groups.Patients ≥80 years who underwent surgery were significantly lower compared with other age groups (14.3%,65 years; 20.5%,65-79 years; 31.3%,≥80 years). In-hospital mortality was lower in the <65-year group (20.3%,<65 years;30.1%,65-79 years;34.7%,≥80 years;p < 0.001) as well as 1-year mortality (3.2%, <65 years; 5.5%, 65-80 years;7.6%,≥80 years; p = 0.003).Independent predictors of mortality were age ≥ 80 years (hazard ratio [HR]:2.78;95% confidence interval [CI]:2.32–3.34), CCI ≥ 3 (HR:1.62; 95% CI:1.39–1.88),and non-performed surgery (HR:1.64;95% CI:11.16–1.58).When the three age groups were compared,the AUROC curve for CCI was significantly larger for patients aged <65 years(p < 0.001) for both in-hospital and 1-year mortality. [Conclusion]: There were no differences in the clinical presentation of IE between the groups. Age ≥ 80 years, high comorbidity (measured by CCI),and non-performance of surgery were independent predictors of mortality in patients with IE.CCI could help to identify those patients with IE and surgical indication who present a lower risk of in-hospital and 1-year mortality after surgery, especially in the <65-year group

Magnetic properties of iron oxide nanoparticles prepared by seeded-growth route

In this work we investigate the magnetic properties of iron oxide nanoparticles obtained by two-step synthesis (seeded-growth route) with sizes that range from 6 to 18 nm. The initial seeds result monocrystalline and exhibit ferromagnetic behavior with low saturation field. The subsequent growth of a shell enhances the anisotropy inducing magnetic frustration, and, consequently, reducing its magnetization. This increase in anisotropy occurs suddenly at a certain size (~10 nm). Electronic and structural analysis with X-ray absorption spectroscopy indicates a step reduction in the oxidation state as the particle reaches 10 nm size while keeping its overall structure in spite of the magnetic polydispersity. The formation of antiphase magnetic boundaries due to island percolation in the growing shells is hypothesized to be the mechanism responsible of the magnetic behavior, as a direct consequence of the two-step synthesis route of the nanoparticles.This work was supported by the European project MAGNIFYCO (Contract NMP4-SL-2009-228622); Spanish Ministerio de Economía y Competitividad grants CSD2009-00013, MAT2011-27470-C02-02, and FIS-2008-06249; and Madrid Region Council project NANOBIOMAGNET (S2009/MAT-1726). A. F. acknowledges financial support from the Spanish MICINN through CTQ2009-06959 and for a Ramón y Cajal Fellowship (RYC-2010-05821).Peer Reviewe

Retrospective multicentre observational study on clinical management and treatment of different types of status epilepticus in clinical practice

Introduction: Status epilepticus (SE) is a neurological emergency associated with significant mortality and morbidity. We analyse characteristics of this entity in our population. Methods: Data from electronic medical records of adults diagnosed with SE were collected retrospectively from 5 hospitals over 4 years. Results: Data reflected 84 episodes of SE in 77 patients with a mean age of 60.3 years. Of this sample, 52.4% had a previous history of epilepsy. Status classification: 47.6% tonic–clonic, 21.4% complex partial, 17.9% partial motor, 6% partial simple, 3.6% myoclonic, and 3.6% subtle SE. Based on the duration of the episode, SE was defined in this study as early stage (up to 30 min) in 13.1%, established (30-120 min) in 20.2%, refractory (more than 120 min) in 41.7%, and super-refractory (episodes continuing or recurring after more than 24 h of anaesthesia) in 13.1%. Ten patients (11.9%) died when treatment failed to control SE. The cumulative percentage of success achieved was 8.3% with the first treatment, 27.3% for the second, 48.7% for the third, 58.2% for the fourth, 70.1% for the fifth, 80.8% for the sixth, 83.2% for the seventh, and 84.4% for the eighth. Conclusions: In our study, we found that SE did not respond to treatment within 2 hours in approximately half the cases and 11.9% of the patients died without achieving seizure control, regardless of the type of status. Half the patients responded by the third treatment but some patients needed as many as 8 treatments to resolve seizures. Using large registers permitting analysis of the different types and stages of SE is warranted. Resumen: Introducción: El estatus epiléptico es una urgencia neurológica asociada a una mortalidad y morbilidad significativa. Analizamos las características en nuestra población. Métodos: Se recogieron los datos de manera retrospectiva de la historia clínica electrónica de adultos con diagnóstico de estatus epiléptico en 5 centros hospitalarios durante 4 años. Resultados: Se obtuvieron datos de un total de 84 episodios en 77 pacientes, con edad media de 60,3 años. El 52,4% tenían historia previa de epilepsia. Clasificación según el tipo de estatus: 47,6% tónico-clónico; 21,4% parcial complejo; 17,9% parcial motor; 6% parcial simple; 3,6% mioclónico y 3,6% sutil. Si analizamos el momento que finalizó el estatus según las fases definidas para este estudio obtenemos: 13,1% precoz (hasta 30 min); 20,2% establecido (entre 30-120 min); 41,7% refractario (más de 120 min) y 13,1% superrefractario (continúan o recurren después de más de 24 h de anestesia). Diez casos (11,9%) fallecieron sin haberse controlado el estatus. El porcentaje acumulativo de éxito alcanzado con el primer tratamiento fue de 8,3%; segundo 27,3%; tercero 48,7%; cuarto 58,2%; quinto 70,1%; sexto 80,8%; séptimo 83,2% y octavo 84,4%. Conclusiones: En nuestro estudio encontramos que el estatus no se controló en las primeras 2 h en casi la mitad de los casos, y un 11,9% fallecieron sin controlarse, sin haber diferencias significativas entre el tipo de estatus. En casi la mitad se logró el control del estatus con el tercer tratamiento, pero en algún caso se precisó hasta 8. Son necesarios registros amplios que permitan analizar el manejo en los distintos tipos y fases. Keywords: Status epilepticus, Treatment, Prognosis, Tonic–clonic, Complex partial, Partial motor, Palabras clave: Estatus epileptico, Tratamiento, Pronóstico, Tónico-clonico, Parcial complejo, Parcial moto