923 resultados para Pulmões - Doenças obstrutivas - Fisiopatologia


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Nitric oxide (NO) is a free radical gas, inorganic, which has seven electrons of nitrogen and oxygen eight, possessing an unpaired electron. This radical is produced from L-arginine by a reaction mediated by the enzyme NO synthase. NO it is about a radical of who acts abundant on a variety of biological processes, particularly when produced by endothelial cells plays a significant role in cardiovascular control, as a modulator of peripheral vascular resistance and platelet aggregation. This free radical has also a neurotransmitter and mediator of the immune system. NO kidney function has been considered in many physiological functions such as: (a) regulation of hemodynamics and glomerular function tubuloglomerular, (b) participation in pressure natriuresis (c) maintaining medullar perfusion (d) inhibiting sodium reabsorption tubular, and (e) acting as a modulator of the activity of the sympathetic nervous system. Given these functions, the occurrence of its deficiency is associated with chronic kidney disease (CKD) in vasoconstriction and consequently glomerular hypertension, high blood pressure (HBP), proteinuria and progression of renal dysfunction. This work has the scope to describe the role of NO in renal physiology and pathophysiology of CKD.

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Após o infarto agudo do miocárdio (IAM), ocorrem alterações complexas na arquitetura ventricular, envolvendo tanto a região infartada como a não infartada. Nos últimos anos, estas adaptações, que podem ser identificadas na fase aguda do IAM, ou mais tardiamente, passaram a ser estudadas com o nome de remodelação ventricular (RV) pós-IAM 1 . O reconhecimento e entendimento deste processo é crítico, pois a RV pode estar associada a um pior prognóstico, pós-infarto, na dependência de diversos fatores. Outro aspecto relevante é que sua evolução pode ser modificada, por meio de diversas intervenções terapêuticas. Assim, abordaremos aspectos fisiopatológicos que envolvem a RV, bem como os efeitos das medicações comumente usadas no tratamento do infarto, nesse processo adaptativo.

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Pós-graduação em Fisiopatologia em Clínica Médica - FMB

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Fisiopatologia em Clínica Médica - FMB

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Ciência Florestal - FCA

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Pós-graduação em Agronomia (Proteção de Plantas) - FCA

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OBJETIVO: Estimar a prevalência de bronquite aguda, rinite e sinusite em crianças e adolescentes e identificar fatores associados. MÉTODOS: Estudo transversal, de base populacional. Foi realizado inquérito domiciliar com 1.185 crianças e adolescentes de São Paulo, SP, de 2008 a 2009. Os participantes foram selecionados a partir de amostragem probabilística, estratificada por sexo e idade e por conglomerados em dois estágios. Para análise ajustada foi realizada regressão múltipla de Poisson. RESULTADOS: Dos entrevistados, 7,3% referiram bronquite aguda, 22,6% rinite e 15,3% sinusite. Após análise ajustada, associaram-se à bronquite aguda auto-referida: idade de zero a quatro anos (RP = 17,86; IC95%: 3,65;90,91), cinco a nove anos (RP = 37,04; IC95%: 8,13;166,67), dez a 14 anos (RP = 20,83; IC95%: 4,93;90,91), referir ter alergia (RP = 3,12; IC95%: 1,70;5,73), cor da pele preta/parda (RP = 2,29; IC95%: 1,21;4,35) e morar em domicílio com um a três cômodos (RP = 1,85; IC95%: 1,17;2,94); à rinite auto-referida: idade dez a 14 anos (RP = 2,77; IC95%: 1,60;4,78), 15 a 19 anos (RP = 2,58; IC95%: 1,52;4,39), referir ter alergia (RP = 4,32; IC95%: 2,79;6,70), referir ter asma (RP = 2,30; IC95%: 1,30;4,10) e morar em apartamento (RP = 1,70; IC95%: 1,06;2,73); à sinusite auto-referida: idade cinco a nove anos (RP = 2,44; IC95%: 1,09;5,43), dez a 14 anos (RP = 2,99; IC95%: 1,36;6,58), 15 a 19 anos (RP = 3,62; IC95%: 1,68;7,81), referir ter alergia (RP = 2,23; IC95%: 1,41;3,52) e apresentar obesidade (RP = 4,42; IC95%: 1,56;12,50). CONCLUSÕES: As doenças respiratórias foram mais prevalentes em grupos populacionais com características definidas, como grupo etário, doenças auto-referidas, tipo de moradia e obesidade.

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Introduction: sexually transmitted diseases (DST) can represent an important impact on teenager’s health due its consequences. Objective: to identify the perception and knowledge of teenagers about DST, its transmission forms and contraception. Methods: it was made a cross-sectional study type investigation, with 136 teenager students from a Technical Education Public Institution in a middle-sized city. It was used a tested instrument, self answered, with opened and closed questions about theme and sociodemographic data. The same data were stored and analyzed by Program Epi Info version 3.5.1. Results: 97,1% affirmed to know male condoms, 89,0% oral contraceptives, 87,5% female condoms, 74,3% postcoital contraceptives, 47,8% natural family planning methods, 41,9% hormonal injection, 33,1% intrauterine devices, 31,6% coitus interruptus and 1,5% other contraceptive methods. According with them, the information was gave principally on high school (46,1%), by friends or partners (20,3%), doctor (10,9%), television (10,2%). In relation to DST, 98,5% affirmed that diseases can be transmitted during coitus. The aids (91,2%) and herpes (72,8%) were the most cited diseases. Just 31,6% of teenagers affirmed that run the risk to acquire some DST, and 88,4% of them, due no use of condoms, 30,2% due their partner make relation with other people, 18% due have many sexual partners and 9,3% due other causes. Conclusion: even teenagers knowing many contraceptive methods and sexually transmitted diseases, the teenagers have not prevented theirselves yet. It’s necessary that the high school reinforce the use of contraceptive methods, because the school is an important source of educative information on health area.

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The association of Helicobacter pylori with different gastric diseases has been continuously discussed in the literature, whereas the last 20 years a large body of publications was intended to characterize the ecological niches and habitats of this pathogen being the mouth a possible habitat for that rod. The present study aimed to discuss the occurrence of this organism as part of the supplemental or transient microbiota of the mouth. Thus, an extensive review of literature covering the period 1990-2014 was carried out with different databases, yielding 5024 articles discussing transmission and occurrence of H. pylori, in English or Portuguese. Articles were selected according to the inclusion and exclusion criteria and data were tabulated and analyzed. Despite the significant heterogeneity of the literature, it was found this microaerophilic has a worldwide distribution, even in the mouth, which behaves as a reservoir for gastric reinfection. The role of oral hygiene and periodontal disease in the distribution of this microorganism remains unclear, but most studies support the hypothesis that oral biofilms and inflammation of periodontium may facilitate the installation of this pathogen in the mouth. Studies suggest that this microorganism could collaborate as a predisposing factor for oral cancer.