Clinical Outcome and Morphologic Determinants of Mural Thrombus in Abdominal Aortic Endografts

OBJECTIVE:Endograft mural thrombus has been associated with stent graft or limb thrombosis after endovascular aneurysm repair (EVAR). This study aimed to identify clinical and morphologic determinants of endograft mural thrombus accumulation and its influence on thromboembolic events after EVAR. METHODS: A prospectively maintained database of patients treated by EVAR at a tertiary institution from 2000 to 2012 was analyzed. Patients treated for degenerative infrarenal abdominal aortic aneurysms and with available imaging for thrombus analysis were considered. All measurements were performed on three-dimensional center-lumen line computed tomography angiography (CTA) reconstructions. Patients with thrombus accumulation within the endograft's main body with a thickness >2 mm and an extension >25% of the main body's circumference were included in the study group and compared with a control group that included all remaining patients. Clinical and morphologic variables were assessed for association with significant thrombus accumulation within the endograft's main body by multivariate regression analysis. Estimates for freedom from thromboembolic events were obtained by Kaplan-Meier plots. RESULTS: Sixty-eight patients (16.4%) presented with endograft mural thrombus. Median follow-up time was 3.54 years (interquartile range, 1.99-5.47 years). In-graft mural thrombus was identified on 30-day CTA in 22 patients (32.4% of the study group), on 6-month CTA in 8 patients (11.8%), and on 1-year CTA in 17 patients (25%). Intraprosthetic thrombus progressively accumulated during the study period in 40 patients of the study group (55.8%). Overall, 17 patients (4.1%) presented with endograft or limb occlusions, 3 (4.4%) in the thrombus group and 14 (4.1%) in the control group (P = .89). Thirty-one patients (7.5%) received an aortouni-iliac (AUI) endograft. Two endograft occlusions were identified among AUI devices (6.5%; overall, 0.5%). None of these patients showed thrombotic deposits in the main body, nor were any outflow abnormalities identified on the immediately preceding CTA. Estimated freedom from thromboembolic events at 5 years was 95% in both groups (P = .97). Endograft thrombus accumulation was associated with >25% proximal aneurysm neck thrombus coverage at baseline (odds ratio [OR], 1.9; 95% confidence interval [CI], 1.1-3.3), neck length ≤ 15 mm (OR, 2.4; 95% CI, 1.3-4.2), proximal neck diameter ≥ 30 mm (OR, 2.4; 95% CI, 1.3-4.6), AUI (OR, 2.2; 95% CI, 1.8-5.5), or polyester-covered stent grafts (OR, 4.0; 95% CI, 2.2-7.3) and with main component "barrel-like" configuration (OR, 6.9; 95% CI, 1.7-28.3). CONCLUSIONS: Mural thrombus formation within the main body of the endograft is related to different endograft configurations, main body geometry, and device fabric but appears to have no association with the occurrence of thromboembolic events over time.

Percutaneous Treatment of Mitral Valve Regurgitation: Initial Experience with the MitraClip Device

INTRODUCTION: Mitral regurgitation (MR) is the most common valvular disease and has recently become the target of a number of percutaneous approaches. The MitraClip is virtually the only device for which there is considerable experience, with more than 20,000 procedures performed worldwide. OBJECTIVE: To describe our initial experience of the percutaneous treatment of MR with the MitraClip device. METHODS: We describe the first six MitraClip cases performed in this institution (mean age 58.5 ± 13.1 years), with functional MR grade 4+ and New York Heart Association (NYHA) heart failure class III or IV (n=3), with a mean follow-up of 290 ± 145 days. RESULTS: Procedural success (MR ≤ 2+) was 100%. Total procedure time was 115.8 ± 23.7 min, with no in-hospital adverse events and discharge between the fourth and eighth day, and consistent improvement in the six-minute walk test (329.8 ± 98.42 vs. 385.33 ± 106.95 m) and in NYHA class (three patients improved by two NYHA classes). During follow-up there were two deaths, in two of the four patients who had been initially considered for heart transplantation. CONCLUSION: In patients with functional MR the MitraClip procedure is safe, with both a high implantation and immediate in-hospital success rate. A longer follow-up suggests that the clinical benefit decreases or disappears completely in patients with more advanced heart disease, namely those denied transplantation or on the heart transplant waiting list.

Time to Left Ventricular Reverse Remodeling after Cardiac Resynchronization Therapy: Better Late than Never

INTRODUCTION: Left ventricular reverse remodeling (LVRR), defined as reduction of end-diastolic and end-systolic dimensions and improvement of ejection fraction, is associated with the prognostic implications of cardiac resynchronization therapy (CRT). The time course of LVRR remains poorly characterized. Nevertheless, it has been suggested that it occurs ≤6 months after CRT. OBJECTIVE: To characterize the long-term echocardiographic and clinical evolution of patients with LVRR occurring >6 months after CRT and to identify predictors of a delayed LVRR response. METHODS: A total of 127 consecutive patients after successful CRT implantation were divided into three groups according to LVRR response: Group A, 19 patients (15%) with LVRR after >6 months (late LVRR); Group B, 58 patients (46%) with LVRR before 6 months (early LVRR); and Group C, 50 patients (39%) without LVRR during follow-up (no LVRR). RESULTS: The late LVRR group was older, more often had ischemic etiology and fewer patients were in NYHA class ≤II. Overall, group A presented LVRR between group B and C. This was also the case with the percentage of clinical response (68.4% vs. 94.8% vs. 38.3%, respectively, p<0.001), and hospital readmissions due to decompensated heart failure (31.6% vs. 12.1% vs. 57.1%, respectively, p<0.001). Ischemic etiology (OR 0.044; p=0.013) and NYHA functional class

Untitled: connecting layers of confusion, sensation and transformation

Dissertação para obtenção do Grau de Mestre em Arte e Ciência do Vidro

Evolution of sarcoma 180 (ascitic tumor) in mice infected with Schistosoma mansoni

Mice infected with 60 cercariae of Schistosoma mansoni were more resistant to the sarcoma 180 ascites tumor. Tumor inoculation was performed 50 days after schistosoma infection and the animals were observed and weighed at 48 hours intervals for development and progression of malignancy. In infected mice the weight gain (ascites formation) started later and was shorter than in uninfected Controls. Also, the number of tumor cells into the peritoneal cavity 72h after tumor implantation was shorter in infected group than incontrols. This in creased resistance against a transplantable tumor probably is related to the effect of endotoxin on tumoricidal activity of macrophages activated by the infection. The immunodepression induced by Schistosoma mansoni infection enhances the proliferation of endogenous bacteria increasing the amount of endotoxin absorbed from the gut.

O acesso ao tratamento em saúde Mental na microregião de Itajubá/MG-Brasil

RESUMO: A integração da saúde mental à atenção básica é a recomendação feita para facilitar o acesso ao tratamento. A pesquisa teve por objetivo mapear e analisar os facilitadores e as barreiras ao acesso ao tratamento em saúde mental da Microrregião de Itajubá, estado de Minas Gerais, Brasil, composta por 15 municípios. A metodologia pautou-se na triangulação dos métodos, combinando a abordagem quantitativa e qualitativa de pesquisa. Para tal foi feito o mapeamento da capacidade instalada dos recursos existentes e identificação das principais lacunas com base nos parâmetros da saúde pública, a partir de roteiros de entrevistas e grupos focais com os principais atores sociais implicados. Constatou-se que o maior facilitador ao acesso ao tratamento tem sido a atuação das equipes de PSF (Programa Saúde da Família), que atuam diretamente nas comunidades. Outros facilitadores foram: a atuação dos CRAS (Centro de Referência de Assistência Social); a existência de um CAPS (Centro de Atenção Psicossocial), embora não credenciado ao SUS (Sistema Único de Saúde); Colegiados de Saúde Mental que promovem discussões, informação, educação, e pressionam os municípios para a implantação de serviços de saúde mental. A falta de “vontade política”, isto é, uma intervenção mais clara da gestão pública da saúde, com estabelecimento de prioridades para prover a ampliação do acesso, foi identificada como a maior barreira a ser enfrentada na microrregião, especialmente por falta de organização e planejamento das ações em saúde mental. Serviços que trabalham de forma isolada, sem a construção de uma rede; pouca participação política dos usuários dos serviços de saúde mental; e falta de recursos humanos, e profissionais pouco preparados para a função compõem as outras barreiras de acesso. Vê-se que diante dos facilitadores e barreiras expostos é preciso que os municípios realizem um levantamento sistemático, a fim de criar um plano de ação em saúde mental para compartilhar informações, recursos, serviços, disponibilidade, disposição e ações em rede.-------------- ABSTRACT: Integrating mental health care in primary-care services is recommended in order to improve access to treatment. Access to mental health treatment has been a worldwide debated theme. In Brazil, with the Psychiatric Reform, there has been a change of paradigm in the way of treating persons with mental disorders. Various health devices were created, building a net of treatment and care that replaces the asylum system and where human rights are respected and defended and the offered treatment is the closest possible to their social space. The research aims to map and analyse the barriers and the facilitators to mental health treatment in the micro-region of Itajubá, state of Minas Gerais/Brazil, made up of 15 counties. The methodology was based on the triangulation of methods, combining quantitative and qualitative research. For that, a mapping of the installed capacity of the existent resource was carried out; identification of the main voids based on the parameters of public health through scripts of interviews and focus groups with the social actors involved. It was found that the main facilitator to treatment has been the performance of PSF, who act directly in the communities. Other facilitators also stand out: the work of CRAS; the existence of CAPS, although not accredited to SUS; Mental Health Collegiate, promoting discussions, information, education, and forcing pressure on the counties for the implantation of mental health services. The lack of political will was identified as the major barrier to be faced in the micro-region, especially due to lack of organization and planning in the actions towards mental health. The services working isolatedly, without a communication net, and the lack of human resources as well as poorly prepared professional, are the main difficulties faced by access to mental health treatment. Becomes clear that the counties need to undertake a systematic survey towards creating a plan of action in mental health, in order to share information, resources, services, availability, disposition and networking.

Qualidade e satisfação do sistema de seguimento à distância de cardioversores-desfibrilhadores implantáveis

RESUMO - Com o aumento da esperança de vida e das doenças crónicas, cada vez se tem implantado mais cardioversores-desfibrilhadores (CDI) para prevenção de morte súbita. O aumento exponencial no número de implantes aumenta o número de seguimentos dos dispositivos, sobrecarregando os profissionais de saúde e comprometendo a qualidade dos serviços prestados. Segundo as recomendações internacionais, um CDI deverá ser vigiado a cada 3 meses, o que perfaz 4 consultas por ano/doente no mínimo, se não existirem episódios de “choques” ou “descompensações” clínicas, e mensalmente quando é atingido o indicador de substituição electiva do gerador. A evolução da tecnologia, de algoritmos, visualização de episódios e terapias requer recursos técnicos e humanos diferenciados e um gasto de tempo considerável no seguimento. Em países como os Estados Unidos da América, em que os doentes têm de percorrer distâncias muito grandes para aceder aos cuidados de saúde, tornou-se preemente a necessidade de um sistema de vigilância alternativo. Nesse sentido, e usando o conceito da telemedicina, foi criado o seguimento/monitorização à distância de dispositivos cardíacos. Este reduz os custos em consultas, deslocações e recursos humanos, uma vez que contempla apenas uma consulta presencial por ano. Por outro lado, aumenta a segurança do doente com a monitorização periódica e a criação de alarmes, permitindo uma assistência de qualidade e intervenção adequada imediata. Aproveitando as vantagens que este tipo de sistema de transmissão remota oferece, procedeu-se no meu serviço, à distribuição inicial de 62 comunicadores a doentes portadores de CDI´s ou com Ressincronizadores Cardíacos (TRC´s1). Apesar de ser considerada uma melhoria na qualidade dos serviços prestados, é também uma mudança importante na metodologia da consulta feita até aqui. Segundo vários autores, a avaliação da qualidade dos cuidados em saúde está intrinsecamente ligada ao grau de satisfação dos doentes com esses serviços, ou seja, à relação entre as suas expectativas e os resultados percebidos por eles, sendo considerado um importante indicador de qualidade dos serviços. Com este trabalho, pretende-se avaliar a percepção dos doentes face ao novo seguimento em termos de aceitação, satisfação, validade, segurança e confiança no novo sistema. Se este mantém os mesmos padrões de qualidade que o seguimento presencial. Trata-se de um estudo transversal com uma componente retrospectiva de avaliação da nova metodologia de consulta à distância. Para tal, foi elaborado um questionário, que foi aplicado a 40 doentes (17,5% do género feminino e 82,5% do género masculino; média de idades de 65 anos) que constituíram a amostra do estudo. Verificou-se uma média de 5 anos de tempo de implante do CDI. Dos dados obtidos, é de realçar que 70% dos inquiridos estão satisfeitos e 30% estão muito satisfeitos com esta nova metodologia de consulta e cerca 67,4% prefere a consulta à distância. Quando solicitados para comparar a qualidade do serviço prestado entre as duas consultas, 65% respondeu igual e 27,5% melhor. Todos os inquiridos responderam ter confiança e segurança com o sistema de consulta à distância. Cerca de 87,5% dos inquiridos vê-se mesmo a continuar com este tipo de consulta. Os resultados obtidos são bastante satisfatórios no que diz respeito à transição do modo como a consulta de CDI´s é feita. Reflectem também que a tecnologia não é necessariamente uma barreira no acesso aos profissionais de saúde, desde que suportada por algum contacto directo (telefone e através de uma consulta presencial por ano). 1 TRC – Terapia de Ressincronização Cardíaca

Modelo ZeEN: uma abordagem minimalista para o desenho de data warehouses

Dissertação apresentada como requisito parcial para obtenção do grau de Mestre em Estatística e Gestão de Informação

Macrofilaricidal effects of chloroquine on adult Onchocerca volvulus by local infiltration of palpable onchocercal nodules

The macrofilaricidal effects of local infiltration of high concentrations of chloroquine into the capsule of onchocercal nodules on adult worms of Onchocerca volvulus was determined. Six weeks post infiltration, histological examination of single nodules showed all adult worms to be dead. With nodule conglomerates, there was localized action of chloroquine only on the adult worms in the infiltrated nodule, with no diffusion of the drug to adjacent nodules. Chloroquine infiltration of young, recently formed nodules to reduce the adult worm load of infected individuals may be an alternative method to costly nodulectomy.

Análise de custo-efectividade da terapêutica de ressincronização cardíaca : avaliação da selecção baseada na dessincronia mecânica

RESUMO - A Terapêutica de Ressincronização Cardíaca (TRC) apresenta benefícios significativos na classe funcional, função ventricular, hospitalização e mortalidade. É uma técnica com custos elevados e, com os actuais métodos de selecção de doentes, a taxa de não-respondedores ronda os 30%. Objectivo: Compreender se a inclusão da dessincronia mecânica (DM) na selecção de doentes para TRC contribui para a sua relação custo-efectividade, na perspectiva do Serviço Nacional de Saúde português. Metodologia: Estudo prospectivo baseado em coortes histórias de 12 meses de dois grupos submetidos a TRC com desfibrilhador, o grupo de intervenção com doentes seleccionados com inclusão da DM (n=133) e o de controlo com selecção baseada exclusivamente nas recomendações internacionais (n=71). Reuniram-se dados clínicos e de custos nos 12 meses subsequentes à implantação, para cálculo do rácio custo-efectividade incremental (RCEI). Resultados: O grupo de intervenção apresentou uma sobrevivência de 91% e o de controlo de 93%, aos 12 meses (p=0,335). O grupo de intervenção apresentou 60 re-internamentos e o de controlo 46 re-internamentos por qualquer causa aos 12 meses (p=0,032), com RCEI=6.886,09€/re-internamento evitado. O grupo de intervenção apresentou 19 re-internamentos e o de controlo apresentou 31 re-internamentos por Insuficiência Cardíaca (IC) descompensada aos 12 meses (p<0,001), com RCEI=2.686,26€/re-internamento por IC descompensada evitado. Relativamente à melhoria da classe funcional e da fracção de ejecção não foi possível estabelecer associações com custos (p>0,05). Conclusão: É seguro afirmar que recomendar a selecção com inclusão da DM, nos hospitais com capacidade instalada, é um passo positivo na redução de custos com re-internamentos de doentes com TRC.

Studies of the assembly of the Streptococcus pneumoniae capsular polysaccharide

Dissertation presented to obtain the Ph.D degree in Biology.

Regulation and function of the cell wall polymer lipoteichoic acid in staphylococcus aureus

A thesis submitted for the Degree of Master in Medical microbiology

Larvicidal activity of oil-resin fractions from the Brazilian medicinal plant Copaifera reticulata Ducke (Leguminosae-Caesalpinoideae) against Aedes aegypti (Diptera, Culicidae)

Oil-resin fractions from Copaifera reticulata Ducke (Leguminosae-Caesalpinoideae) were evaluated for larvicidal activity on third larval instars of Aedes aegypti, in searching for alternative control methods for this mosquito. The bioactive fractions were chemically monitored by thin-layer chromatography, ¹H and 13C nuclear magnetic resonance and mass spectrometry. Bioassays were performed using five repetitions, at a temperature of 28 ± 1°C, relative humidity of 80 ± 5% and light and dark cycles of 12h. Mortality was indicated by darkening of the cephalic capsule after 24h of exposure of the larvae to the solutions. The most active fractions were CRM1-4 (sesquiterpenes) and CRM5-7 (labdane diterpenes), which showed LC50 values of 0.2 and 0.8ppm, respectively.

Domiciliation of Triatoma pseudomaculata (Corrêa e Espínola 1964) in the Jequitinhonha Valley, State of Minas Gerais

Impact of the vector control program was evaluated eight years after implantation of epidemiological surveillance for Chagas’ disease in Berilo, a municipality in the Jequitinhonha Valley of the Brazilian State of Minas Gerais. In all 5,242 domiciliary units (96% of the total) were inspected and 10 found to be infested by the triatomine bug Triatoma pseudomaculata. Triatomines were found associated with bats inside one house and in the peridomiciles of the other nine. None of the 111 Triatoma pseudomaculata captured was infected with Trypanosoma cruzi. Noireau et al16 traps were installed in (n=8) and around (n=100) the infested house but no Trypanpsoma cruzi-infected triatomines were found. None bat, opossums (Didelphis albiventris) and rat captured in the peridomicile were infected with Trypanosoma cruzi although 24% of the inhabitants of the house infested by Triatoma pseudomaculata were seropositive for the parasite, based on ELISA, IHA and IIF.

Effects of flooding of the River Paraná on the temporal activity of Anopheles (Nyssorhynchus) darlingi Root (Diptera: Culicidae), at the border state of Mato Grosso do Sul and São Paulo, Brazil

INTRODUCTION: Study of the temporal activity of malaria vectors during the implantation of a hydroelectric power station on the River Paraná, intended to generate electrical energy. The river separates the States of São Paulo and Mato Grosso do Sul, in Brazil. The objective was to verify whether alterations occurred in the wealth and diversity indices of Anopheles, following two successive floods, extended to the temporal activity and nycthemeral rhythm followed over a five year period. METHODS: Mosquito capture was performed monthly using the Human Attraction Technique and Shannon Traps. The first, executed for 24h, provided the nycthemeral rhythm and the second, lasting 15h, permitted the tracking of Anopheles during the two floods. RESULTS: The bimodal pattern of Anopheles darlingi defined before these floods was modified throughout the environment interventions. The same effect had repercussions on the populations of An albitarsis s.l., An triannulatus and An galvaoi. Activity prior to twilight was less affected by the environment alterations. CONCLUSIONS: The dam construction provoked changes in Anopheles temporal activity patterns, permitting classification of the area as an ecologically steady and unstable situation. Differences observed in Anopheles behavior due to the capture methods revealed the influence of solo and multiple attractiveness inside the populations studied.