The anatomy of interatrial communications - what does the interventionist need to know?

Increasingly, the interventional cardiologist is seeking to close interatrial communications by inserting devices by means of catheterisation. So as to optimise these procedures, it is adavantageous to have a firm grasp of the anatomy of the normal atrial septal structures, this then providing the basis to understand the morphology of the holes which can exist between the chambers, not all of which are true septal defects.A true septal structure can be removed without exiting from the cavities of the heart. It is the flap valve of the oval fossa, along with the anterior rim of the fossa, which fulfill this criterion. The remainder of the extensive rim of the normal fossa is no more than an infolding between the walls of the right and left atriums and their venous tributaries, and has different dimensions at various points around the ircumference. The so-called muscular atrioventricular “septum” is a sandwich incorporating a layer of epicardial fibro-adipose tissue. True defects of the atrial septum, therefore, exist because of deficiency, perforation, or absence of the flap valve. Most of these defects will prove suitable for interventional closure, but potential caveats include multiple defects, aneurysm of the flap valve, or adjacency of the fossa to the venous orifices. The other interatrial communications, namely the sinus venosus, coronary sinus, and “ostium primum” defects are outside the confines of the oval fossa. Recognition of this feature is the key to their diagnosis, and their ifferentiation from true atrial septal defects. Of these defects, only the coronary sinus defect is likely to be suitable for device closure, and then only in the very rare circumstances when it is seen in isolatio

Pulmonary Arteriovenous Malformation Closure in a Preterm Newborn

info:eu-repo/semantics/publishedVersio

Search for quark compositeness in dijet angular distributions from pp collisions at √s̅ = 7 TeV

Peer reviewe

Search for supersymmetry in pp collisions at 7 TeV in events with jets and missing transverse energy

A search for supersymmetry with R-parity conservation in proton-proton collisions at a centre-of-mass energy of 7 TeV is presented. The data correspond to an integrated luminosity of 35 pb(-1) collected by the CMS experiment at the LHC. The search is performed in events with jets and significant missing transverse energy, characteristic of the decays of heavy, pair-produced squarks and gluinos. The primary background, from standard model multijet production, is reduced by several orders of magnitude to a negligible level by the application of a set of robust kinematic requirements. With this selection, the data are consistent with the standard model backgrounds, namely t (t) over bar, W + jet and Z + jet production, which are estimated from data control samples. Limits are set on the parameters of the constrained minimal supersymmetric extension of the standard model. These limits extend those set previously by experiments at the Tevatron and LEP colliders. (C) 2011 CMS Collaboration

A new era for understanding amyloid structures and disease

The aggregation of proteins into amyloid fibrils and their deposition into plaques and intracellular inclusions is the hallmark of amyloid disease. The accumulation and deposition of amyloid fibrils, collectively known as amyloidosis, is associated with many pathological conditions that can be associated with ageing, such as Alzheimer disease, Parkinson disease, type II diabetes and dialysis-related amyloidosis. However, elucidation of the atomic structure of amyloid fibrils formed from their intact protein precursors and how fibril formation relates to disease has remained elusive. Recent advances in structural biology techniques, including cryo-electron microscopy and solid-state NMR spectroscopy, have finally broken this impasse. The first near-atomic-resolution structures of amyloid fibrils formed in vitro, seeded from plaque material and analysed directly ex vivo are now available. The results reveal cross-β structures that are far more intricate than anticipated. Here, we describe these structures, highlighting their similarities and differences, and the basis for their toxicity. We discuss how amyloid structure may affect the ability of fibrils to spread to different sites in the cell and between organisms in a prion-like manner, along with their roles in disease. These molecular insights will aid in understanding the development and spread of amyloid diseases and are inspiring new strategies for therapeutic intervention

Measurement of the underlying event activity at the LHC with root s=7 TeV and comparison with root s=0.9 TeV

A measurement of the underlying activity in events with a jet of transverse momentum in the several GeV region is performed in proton-proton collisions at s√=0.9 and 7 TeV, using data collected by the CMS experiment at the LHC. The production of charged particles with pseudorapidity |η|  0.5 GeV/c is studied in the azimuthal region transverse to that of the leading set of charged particles forming a track-jet. A significant growth of the average multiplicity and scalar-p T sum of the particles in the transverse region is observed with increasing p T of the leading track-jet, followed by a much slower rise above a few GeV/c. For track-jet p T larger than a few GeV/c, the activity in the transverse region is approximately doubled with a centre-of-mass energy increase from 0.9 to 7 TeV. Predictions of several QCD-inspired models as implemented in pythia are compared to the data

A case of mistaken identity

What went wrong between the UK media and a report on 'multi-ethnic' Britain

Conhecimentos e práticas em saúde bucal com crianças hospitalizadas com câncer Knowledge and practices of oral health on hospitalized children with cancer

O objetivo do estudo foi avaliar os conhecimentos e práticas em saúde bucal (SB) com crianças hospitalizadas com câncer. A amostra foi composta pela equipe de enfermagem, cuidadores e crianças. Foi aplicado um questionário relacionado ao conhecimento geral sobre SB, métodos e instrumentos utilizados para a higiene oral (HO) e dados socioeconômicos. Baseado nos resultados, quem realiza a HO das crianças são os cuidadores (90,7%), que receberam orientações da equipe de enfermagem em 21,4% dos casos. Com relação ao desconforto na cavidade bucal, a equipe de enfermagem reportou que todos apresentaram manifestações clínicas, enquanto apenas 62,8% dos cuidadores reportaram casos. Todos os participantes consideram importante haver um CD no setor de oncologia. Pôde-se concluir que não existe um protocolo de cuidados com a higiene bucal de crianças hospitalizadas com câncer e que as manifestações bucais mais frequentes entre os pacientes em tratamento antineoplásico foram: mucosite, enjoos, vômitos, xerostomia e ausência de paladar.<br>The aim of this study was to evaluate the knowledge and practices of oral health (OH) in hospitalized children with cancer. The sample was composed by the nurse team, caretakers and children. It was applied a questionnaire concerning the general knowledge about OH, methods and instruments used for oral hygiene (OH). According to the results, the responsible of OH of children are the caretakers (90.7%) who receive instructions from the nurse team in 21.4% of cases. As for the oral cavity discomfort, the nurse team reported that all patients exhibited clinical manifestations while the caretakers reported a different number, 62.8% of cases. All participants considered important having a dentist in the oncology sector. According to the results obtained, it was possible to conclude that there is no oral health protocol for hospitalized children with cancer and that the most frequent oral manifestations among patients going through antineoplastic treatment were: mucositis, nausea, vomit, xerostomy and lack of sense of taste