Base de dados : LILACS
Pesquisa : G07.775 [Categoria DeCS]
Referências encontradas : 1443 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 145 ir para página                         

  1 / 1443 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Texto completo
Id: biblio-1151179
Autor: Gonçalves Dias, Ernandes; Teixeira Barbosa, Elton; Teixeira Barbosa, Elizeu Kleno; Augusto Bardaquim, Vanessa.
Título: Ocorrência de estresse entre acadêmicos de Enfermagem de uma instituição de ensino superior / Ocurrencia de estrés entre estudiantes de Enfermería en una institución de educación superior / Occurrence of stress among nursing students at a higher education institution
Fonte: Av. enferm;39(1):11-20, 01 de enero de 2021.
Idioma: pt.
Resumo: Objetivo: investigar a ocorrência de estresse entre acadêmicos de Enfermagem de uma instituição de ensino superior privada do norte de Minas Gerais, Brasil. Materiais e método: estudo descritivo, transversal e quantitativo, realizado com 34 acadêmicos de Enfermagem de uma faculdade privada do norte de Minas Gerais, Brasil. Os dados foram coletados entre agosto e setembro de 2019 a partir de um questionário autoaplicável. Resultados: observouse maioria de participantes do gênero feminino (82,35 %), na faixa etária entre 20 e 25 anos (76,47 %), solteira (67,65 %) e residente em ciudades circunvizinhas (58,81 %). As situações que apareceram com maior frequência como muito estressantes foram: a distância entre a maioria dos campos de estágio/ensino clínico e o local de moradia, o transporte utilizado para chegar ao local do estágio/ensino clínico, a falta de tempo para descanso e o transporte utilizado para chegar à faculdade. Conclusões: a graduação em Enfermagem é um ambiente com presença de fatores que colaboram para a ocorrência de estresse; as situações mais estressantes são de acesso físico e planejamento da rotina estudantil. Nesse sentido, é importante buscar estratégias que visem minimizar as fontes geradoras de estresse, com a intenção de melhorar a qualidade de vida e tornar o aprendizado prazeroso.

Objetivo: investigar la ocurrencia de estrés entre los estudiantes de Enfermería en una institución priva-da de educación superior en el norte de Minas Gerais, Brasil. Materiales y método: estudio descriptivo, transversal y cuantitativo, realizado con 34 estudiantes de Enfermería de una facultad privada en el norte de Minas Gerais, Brasil. Los datos se recopilaron entre agosto y septiembre de 2019 a partir de un cuestionario autoadministrado. Resultados: la mayoría de participantes fue de género femenino (82,35 %), con edades entre 20 y 25 años (76,47 %), soltera (67,65 %) y con vivienda en ciudades aledañas (58,81 %). Las situaciones que aparecieron con mayor frecuencia como muy estresantes fueron: la distancia entre la mayoría de los campos de pasantía/enseñanza clínica y el lugar de residencia, el transporte utilizado para llegar al lugar de pasantía/enseñanza clínica, la falta de tiempo para descansar y el transporte utilizado para llegar a la facultad. Conclusiones: el pregrado de Enfermería es un entorno con la presencia de factores que contribuyen a la aparición del estrés; las situaciones más estresantes son el acceso físico y la planificación de la rutina del alumno. En este sentido, es importante buscar estrategias que tengan como objetivo minimizar las fuentes que generan estrés, con la intención de mejorar la calidad de vida y hacer que el aprendizaje sea agradable.

Objective: To examine the occur-rence of stress among nursing students at a private higher education institution in northern Minas Gerais, Brazil. Materials and method:Descriptive, cross-sectional, and quantitative study carried out with 34 nursing students at a private faculty in northern Minas Gerais, Brazil. Data were collected between August and September 2019 using a self-administered questionnaire. Results: Most participants were female students (82.35 %), aged 20 to 25 years (76.47 %), single (67.65 %), and residents of the surrounding cities (58.81 %). The situations most frequently identified as highly stressful were: the distance between most of the internship/clinical teaching fields and the place of residence, transportation used to reach the internship/clinical teaching location, lack of time to rest, and the transportation used to get to the faculty. Conclusions: Undergraduate nursing is an environment with the presence of factors that contrib-ute to the occurrence of stress. The most stressful situations are physical access to certain locations and the planning of student's routine. In this sense, it is important to look for strategies that aim to minimize the sources that generate stress, with the intention of improving the quality of life of students and making learning more enjoyable.
Descritores: Escolas de Enfermagem
Estresse Fisiológico
Estresse Psicológico
Estudantes de Enfermagem
Educação em Enfermagem
Limites: Humanos
Adulto
Tipo de Publ: Estudo Observacional
Responsável: CO136.1 - Biblioteca


  2 / 1443 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Id: biblio-1160830
Autor: Sotelo Lago, Alicia.
Título: Stress y nuevo siglo / Stress and new century
Fonte: Bol. Acad. Nac. Med. B.Aires;(supl):137-48, jul. 1992. ilus.
Idioma: es.
Conferência: Apresentado em: Simposio Ambiente y Salud para el Siglo XXI, 10, Buenos Aires, 14-16 abr. 1993.
Descritores: Estresse Fisiológico
Homeostase
Neuroendocrinologia
-Hormônio Adrenocorticotrópico
Hormônio do Crescimento
Sistema Nervoso Central
Limites: Humanos
Responsável: AR1.1 - Biblioteca Rafael Herrera Vegas


  3 / 1443 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: biblio-983944
Autor: Ren, Yongzhe; Yue, Huifang; Li, Le; Xu, Yanhua; Wang, Zhiqiang; Xin, Zeyu; Lin, Tongbao.
Título: Identification and characterization of circRNAs involved in the regulation of low nitrogen-promoted root growth in hexaploid wheat
Fonte: Biol. Res;51:43, 2018. tab, graf.
Idioma: en.
Projeto: National Natural Science Foundation of China; . National Key Research and Development Program of China; . National Key Research and Development Program of China; . Natural Science Foundation of Henan province; . State Key Laboratory Program.
Resumo: BACKGROUND: CircRNAs are widespread in plants and play important roles in response to abiotic stresses. Low nitrogen (LN) promotes the growth of plant root system, allowing it to explore more nitrogen. However, whether circRNAs involved in the response to LN stress and the regulation of LN-promoted root growth in wheat remains unclear. METHODS: Two wheat varieties (LH9 and XN979) with contrasting root phenotypes to LN stress were used as materials to identify circRNAs under control and LN conditions by using high-throughput sequencing technology. RESULTS: Six differentially expressed circRNAs (DECs) involved in the common response to LN stress and 23 DECs involved in the regulation of LN-promoted root growth were successfully identified. GO analysis of the DEC-host genes involved in the regulation of LN-promoted root growth showed that GO terms related to biological regulation, responses to stimuli and signalling were significantly enriched. Moreover, seven DECs were predicted to have miRNA binding sites and may serve as miRNA sponges to capture miRNAs from their target genes. CONCLUSIONS: LN stress altered the expression profiles of circRNAs in wheat. This is the first report of LN stress responsive circRNAs in plants. Our results provided new clues for investigating the functions of circRNAs in response to LN stress and in the regulation of LN-promoted wheat root growth.
Descritores: Estresse Fisiológico/fisiologia
Triticum/crescimento & desenvolvimento
RNA/isolamento & purificação
Raízes de Plantas/crescimento & desenvolvimento
Regulação da Expressão Gênica de Plantas/fisiologia
Nitrogênio/metabolismo
-Triticum/fisiologia
RNA/metabolismo
RNA Circular
Responsável: CL1.1 - Biblioteca Central


  4 / 1443 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: biblio-983950
Autor: Anwar, Ali; Liu, Yumei; Dong, Rongrong; Bai, Longqiang; Yu, Xianchang; Li, Yansu.
Título: The physiological and molecular mechanism of brassinosteroid in response to stress: a review
Fonte: Biol. Res;51:46, 2018. tab, graf.
Idioma: en.
Projeto: Fundamental Research Funds; . National Key Research and Development Program of China; . Earmarked fund.
Resumo: The negative effects of environmental stresses, such as low temperature, high temperature, salinity, drought, heavy metal stress, and biotic stress significantly decrease crop productivity. Plant hormones are currently being used to induce stress tolerance in a variety of plants. Brassinosteroids (commonly known as BR) are a group of phytohormones that regulate a wide range of biological processes that lead to tolerance of various stresses in plants. BR stimulate BRASSINAZOLE RESISTANCE 1 (BZR1)/BRI1-EMS SUPPRESSOR 1 (BES1), transcription factors that activate thousands of BR-targeted genes. BR regulate antioxidant enzyme activities, chlorophyll contents, photosynthetic capacity, and carbohydrate metabolism to increase plant growth under stress. Mutants with BR defects have shortened root and shoot developments. Exogenous BR application increases the biosynthesis of endogenous hormones such as indole-3-acetic acid, abscisic acid, jasmonic acid, zeatin riboside, brassinosteroids (BR), and isopentenyl adenosine, and gibberellin (GA) and regulates signal transduction pathways to stimulate stress tolerance. This review will describe advancements in knowledge of BR and their roles in response to different stress conditions in plants.
Descritores: Estresse Fisiológico/fisiologia
Fatores de Transcrição/genética
Transdução de Sinais/genética
Regulação da Expressão Gênica de Plantas/genética
Brassinosteroides/metabolismo
-Estresse Fisiológico/genética
Transdução de Sinais/fisiologia
Regulação da Expressão Gênica de Plantas/fisiologia
Tipo de Publ: Revisão
Responsável: CL1.1 - Biblioteca Central


  5 / 1443 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: biblio-983951
Autor: Khan, Aziz; Pan, Xudong; Najeeb, Ullah; Tan, Daniel Kean Yuen; Fahad, Shah; Zahoor, Rizwan; Luo, Honghai.
Título: Coping with drought: stress and adaptive mechanisms, and management through cultural and molecular alternatives in cotton as vital constituents for plant stress resilience and fitness
Fonte: Biol. Res;51:47, 2018. tab, graf.
Idioma: en.
Projeto: National Natural Science Foundation of China.
Resumo: Increased levels of greenhouse gases in the atmosphere and associated climatic variability is primarily responsible for inducing heat waves, flooding and drought stress. Among these, water scarcity is a major limitation to crop productivity. Water stress can severely reduce crop yield and both the severity and duration of the stress are critical. Water availability is a key driver for sustainable cotton production and its limitations can adversely affect physiological and biochemical processes of plants, leading towards lint yield reduction. Adaptation of crop husbandry techniques suitable for cotton crop requires a sound understanding of environmental factors, influencing cotton lint yield and fiber quality. Various defense mechanisms e.g. maintenance of membrane stability, carbon fixation rate, hormone regulation, generation of antioxidants and induction of stress proteins have been found play a vital role in plant survival under moisture stress. Plant molecular breeding plays a functional role to ascertain superior genes for important traits and can offer breeder ready markers for developing ideotypes. This review highlights drought-induced damage to cotton plants at structural, physiological and molecular levels. It also discusses the opportunities for increasing drought tolerance in cotton either through modern gene editing technology like clustered regularly interspaced short palindromic repeat (CRISPR/Cas9), zinc finger nuclease, molecular breeding as well as through crop management, such as use of appropriate fertilization, growth regulator application and soil amendments.
Descritores: Estresse Fisiológico/fisiologia
Adaptação Fisiológica/fisiologia
Plantas Geneticamente Modificadas/fisiologia
Regulação da Expressão Gênica de Plantas/fisiologia
Gossypium/fisiologia
Secas
-Estresse Fisiológico/genética
Adaptação Fisiológica/genética
Plantas Geneticamente Modificadas/genética
Regulação da Expressão Gênica de Plantas/genética
Gossypium/genética
Aclimatação/genética
Tipo de Publ: Revisão
Responsável: CL1.1 - Biblioteca Central


  6 / 1443 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: biblio-1011416
Autor: Wang, Xinbo; Ren, Yongzhe; Li, Jingjing; Wang, Zhiqiang; Xin, Zeyu; Lin, Tongbao.
Título: Knock-down the expression of TaH2B-7D using virus-induced gene silencing reduces wheat drought tolerance
Fonte: Biol. Res;52:14, 2019. graf.
Idioma: en.
Projeto: National Key Research and Development Program of China; . Natural Science Foundation of Henan province; . State Key Laboratory Program.
Resumo: BACKGROUND: Drought is a major abiotic stress affecting global wheat (Triticum aestivum L.) production. Exploration of drought-tolerant genes is essential for the genetic improvement of drought tolerance in wheat. Previous studies have shown that some histone encoding genes are involved in plant drought tolerance. However, whether the H2B family genes are involved in drought stress response remains unclear. METHODS: Here, we identified a wheat histone H2B family gene, TaH2B-7D, which was significantly up-regulated under drought stress conditions. Virus-induced gene silencing (VIGS) technology was used to further verify the function of TaH2B-7D in wheat drought tolerance. The phenotypic and physiological changes were examined in the TaH2B-7D knock-down plants. RESULTS: In the TaH2B-7D knock-down plants, relative electrolyte leakage rate and malonaldehyde (MDA) content significantly increased, while relative water content (RWC) and proline content significantly decreased compared with those in the non-knocked-down plants under drought stress conditions. TaH2B-7D knock-down plants exhibited severe sagging, wilting and dwarf phenotypes under drought stress conditions, but not in the non-knocked-down plants, suggesting that the former were more sensitive to drought stress. CONCLUSION: These results indicate that TaH2B-7D potentially plays a vital role in conferring drought tolerance in wheat.
Descritores: Proteínas de Plantas/genética
Estresse Fisiológico/genética
Triticum/genética
Regulação da Expressão Gênica de Plantas/genética
Inativação Gênica
Secas
-Fenótipo
Proteínas de Plantas/metabolismo
Estresse Fisiológico/fisiologia
Triticum/metabolismo
Plantas Geneticamente Modificadas/genética
Fenômenos Fisiológicos Vegetais/genética
Reação em Cadeia da Polimerase em Tempo Real
Responsável: CL1.1 - Biblioteca Central


  7 / 1443 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: biblio-1139384
Autor: Aguilar, Carolina; Sepúlveda, Rodrigo Andrés; Tagle, Rodrigo.
Título: Cetoacidosis por estrés: caso clínico en paciente con atrofia muscular espinal / Stress induced ketoacidosis in spinal muscular atrophy: report of one case
Fonte: Rev. méd. Chile;148(6):875-880, jun. 2020. tab, graf.
Idioma: es.
Resumo: Spinal muscular atrophy is an uncommon cause of ketoacidosis, where there is a decrease in muscle mass, an abnormal metabolism of glucose and fatty acids, and changes in neuroendocrine function. These conditions favor the accumulation of keto acids and the development of metabolic acidosis. We report a 26-year-old female, with a history of spinal muscular atrophy type III, consulting for abdominal pain and vomiting lasting one week. She was admitted to the emergency service somnolent and poorly perfused. She had a pH of 6.98, HCO3- of 3.8 mmol/L, pCO2 of 16.4 mmHg, BE of -26 mmol/L, delta ratio of 1.05, anion gap of 31 mEq/L, creatinine of 0.37 mg/dL, sodium of 147 mEq/L, potassium of 3.7 mEq/L, chloride of 112 mEq/L, lactate of 1.2 mmol/L, glucose of 108 mg/dL, albumin of 4.2 g/dL, ketonemia +++, ketonuria +, measured plasma osmolality of 322 mOsm/kg, estimated osmolality of 314 mOsm/kg, toxilab negative, salicylate levels < 3 µg/mL, acetaminophen levels < 1.2 µg/mL. Intravenous hydration and bicarbonate were started, without satisfactory response. Interpreting the clinical picture as a ketoacidosis induced by stress in a patient with spinal muscular atrophy, it was handled with glucose, amino acids, vitamins and trace elements, with a favorable response.
Descritores: Atrofia Muscular Espinal/complicações
Cetose/etiologia
-Estresse Fisiológico
Bicarbonatos
Glucose
Limites: Humanos
Feminino
Adulto
Tipo de Publ: Relatos de Casos
Responsável: CL1.1 - Biblioteca Central


  8 / 1443 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1149526
Autor: Medeiros, Joycimara da Silva Sales de; Oliveira, Luciane Paula Batista Araújo de; Medeiros, Anna Cecília Queiroz de; Távora, Rafaela Carolini de Oliveira; Barros, Wanessa Cristina Tomaz dos Santos.
Título: Efeito da música como recurso terapêutico em grupo de convivência para pessoas idosas / Effect of music as a therapeutic resource in a support group for the elderly
Fonte: Rev Rene (Online);22:e60048, 2021. tab, graf.
Idioma: pt.
Resumo: RESUMO Objetivo analisar o efeito de intervenções musicais na redução dos níveis de estresse em pessoas idosas. Métodos pesquisa quantitativa, do tipo quase-experimental, em que se avaliou o nível de estresse antes e depois de intervenções com música, com o método musicoterápico, denominado experiência receptiva, em 25 pessoas idosas de um grupo de convivência. Utilizou-se da Escala de Estresse Percebido e realizou-se a análise estatística descritiva e inferencial. Resultados na avaliação do estresse percebido, a média foi de 33,6 (Desvio-padrão 5,17) pontos no pré-teste e 31,6 (Desvio-padrão 2,29) pontos no pós-teste (p<0,05). Na avaliação por dimensão, a redução na pontuação foi identificada apenas no fator perceived distress. Identificou-se, no pré-teste, que quanto maior a renda mensal, menor o estresse percebido (p=0,043). Conclusão intervenções musicais com os participantes deste estudo foram capazes de reduzir os níveis de estresse, indicando a validade da música como recurso terapêutico em ações de promoção à saúde.

ABSTRACT Objective to analyze the effect of musical interventions to reduce stress levels in the elderly. Methods quantitative research, of quasi-experimental type, in which the level of stress was assessed before and after interventions with the music therapy method, called receptive experience, in 25 elderly people in a support group. The Perceived Stress Scale was used and descriptive and inferential statistical analysis was performed. Results in the assessment of perceived stress, the average was 33.6 (standard deviation 5.17) points in the pre-test and 31.6 (standard deviation 2.29) points in the post-test (p<0.05). In the assessment dimension, the reduction was identified only in the perceived distress factor. Pre-tests outcomes showed that the higher the monthly income, the lower the perceived stress (p=0.043). Conclusion musical interventions with the participants of this study were able to reduce stress levels, indicating the importance of music as a therapeutic resource in health promotion actions.
Descritores: Estresse Fisiológico
Idoso
Enfermagem
Musicoterapia
Responsável: BR6.1 - BCS - Biblioteca de Ciências da Saúde


  9 / 1443 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: biblio-1011422
Autor: Wei, Fan; Tang, Danfeng; Li, Zengqiang; Kashif, Muhammad Haneef; Khan, Aziz; Lu, Hai; Jia, Ruixing; Chen, Peng.
Título: Molecular cloning and subcellular localization of six HDACs and their roles in response to salt and drought stress in kenaf (Hibiscus cannabinus L)
Fonte: Biol. Res;52:20, 2019. tab, graf.
Idioma: en.
Projeto: National Natural Science Foundation of China; . Modern Agro-industry Technology Research System.
Resumo: BACKGROUND: Histone acetylation is an important epigenetic modification that regulates gene activity in response to stress. Histone acetylation levels are reversibly regulated by histone acetyltransferases (HATs) and histone deacetylases (HDACs). The imperative roles of HDACs in gene transcription, transcriptional regulation, growth and responses to stressful environment have been widely investigated in Arabidopsis. However, data regarding HDACs in kenaf crop has not been disclosed yet. RESULTS: In this study, six HDACs genes (HcHDA2, HcHDA6, HcHDA8, HcHDA9, HcHDA19, and HcSRT2) were isolated and characterized. Phylogenetic tree revealed that these HcHDACs shared high degree of sequence homology with those of Gossypium arboreum. Subcellular localization analysis showed that GFP-tagged HcHDA2 and HcHDA8 were predominantly localized in the nucleus, HcHDA6 and HcHDA19 in nucleus and cytosol. The HcHDA9 was found in both nucleus and plasma membranes. Real-time quantitative PCR showed that the six HcHDACs genes were expressed with distinct expression patterns across plant tissues. Furthermore, we determined differential accumulation of HcHDACs transcripts under salt and drought treatments, indicating that these enzymes may participate in the biological process under stress in kenaf. Finally, we showed that the levels of histone H3 and H4 acetylation were modulated by salt and drought stress in kenaf. CONCLUSIONS: We have isolated and characterized six HDACs genes from kenaf. These data showed that HDACs are imperative players for growth and development as well abiotic stress responses in kenaf.
Descritores: Estresse Fisiológico/fisiologia
Hibiscus/enzimologia
Histona Acetiltransferases/fisiologia
Secas
Histona Desacetilases/fisiologia
-Ativação Transcricional/fisiologia
Clonagem Molecular
Hibiscus/crescimento & desenvolvimento
Hibiscus/fisiologia
Reação em Cadeia da Polimerase em Tempo Real
Responsável: CL1.1 - Biblioteca Central


  10 / 1443 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Mill, José Geraldo
Texto completo
Id: biblio-1055073
Autor: Elias Neto, Jorge; Ferreira, Albano; Futuro, Guilherme; Santos, Luiz Carlos dos; Heringer Filho, Nevelton; Gomes, Fernando; Mill, Jose Geraldo.
Título: Influences on the Functional Behavior of Great Arteries during Orthostasis / Gravidade Influencia o Comportamento Funcional das Grandes Artérias Durante a Ortostase
Fonte: Arq. bras. cardiol;113(6):1072-1081, Dec. 2019. tab, graf.
Idioma: en.
Resumo: Abstract Background: Arterial compliance reduction has been associated with aging and hypertension in supine position. However, the dynamic effects of orthostatism on aortic distensibility has not been defined. Objective: We sought to determine the orthostatic influence and the interference of age, blood pressure (BP) and heart rate (HR) on the great arteries during gravitational stress. Methods: Ninety-three healthy volunteers (age 42 ± 16 years). Carotid-femoral pulse wave velocity (PWV) assumed as aortic stiffness was assessed in supine position (basal phase), during tilt test (TT) (orthostatic phase) and after return to supine position (recovery phase). Simultaneously with PWV acquisition, measures of BP and HR rate were recorded. Results: PWV during TT increased significantly compared to the basal and recovery phases (11.7 ± 2.5 m/s vs. 10.1 ± 2.3 m/s and 9.5 ± 2.0 m/s). Systolic BP (r = 0.55, r = 0.46 and r = 0.39) and age (r = 0.59, r = 0.63 and r = 0.39) correlated with PWV in all phases. The significance level for all tests was established as α = 0.05. Conclusion: We conclude that there is a permanent increase in PWV during orthostatic position that was returned to basal level at the recovery phase. This dynamic pattern of PWV response, during postural changes, can be explained by an increase in hydrostatic pressure at the level of abdominal aorta which with smaller radius and an increased elastic modulus, propagates the pulse in a faster way. Considering that it could increase central pulse reflection during the orthostatic position, we speculate that this mechanism may play a role in the overall adaptation of humans to gravitational stress.

Resumo Fundamento: A redução da complacência arterial tem sido associada ao envelhecimento e à hipertensão na postura supina. Entretanto, os efeitos dinâmicos do ortostatismo na distensibilidade aórtica não foram definidos. Objetivo: Determinar a influência ortostática e a interferência da idade, pressão arterial (PA) e frequência cardíaca (FC) sobre as grandes artérias durante o estresse gravitacional. Métodos: Noventa e três voluntários saudáveis (idade de 42 ± 16 anos). A velocidade da onda de pulso carotídeo-femoral (VOP), assumida como rigidez aórtica, foi avaliada na posição supina (fase basal) durante o teste de inclinação (TT) (fase ortostática) e após o retorno à posição supina (fase de recuperação). Simultaneamente à aquisição da PWV, registrou-se as medidas de PA e FC. Resultados: A VOP durante o TT aumentou significativamente em comparação com as fases basal e de recuperação (11,7 ± 2,5 m/s vs. 10,1 ± 2,3 m/se 9,5 ± 2,0 m/s). PA sistólica (r = 0,55, r = 0,46 e r = 0,39) e idade (r = 0,59, r = 0,63 e r = 0,39) correlacionaram-se com a VOP em todas as fases. O nível de significância para todos os testes foi estabelecido como = 0,05. Conclusão: Observou-se um aumento permanente da VOP durante a postura ortostática, que retornou ao nível basal na fase de recuperação. Esse padrão dinâmico de resposta da VOP, durante as alterações posturais, pode ser explicado pelo aumento da pressão hidrostática no nível da aorta abdominal que, com raio menor e aumento do módulo de elasticidade, propaga o pulso de maneira mais rápida. Considerando-se que poderia aumentar a reflexão do pulso central durante a posição ortostática, podemos especular que esse mecanismo pode desempenhar um papel na adaptação global do humano ao estresse gravitacional.
Descritores: Artérias/fisiologia
Barorreflexo/fisiologia
Rigidez Vascular/fisiologia
Análise de Onda de Pulso
Frequência Cardíaca/fisiologia
Hipotensão Ortostática
-Postura
Estresse Fisiológico
Velocidade do Fluxo Sanguíneo
Adaptação Fisiológica
Fenômenos Fisiológicos Cardiovasculares
Índice de Massa Corporal
Gravitação
Limites: Humanos
Masculino
Feminino
Adolescente
Adulto
Pessoa de Meia-Idade
Idoso
Adulto Jovem
Responsável: BR1.1 - BIREME



página 1 de 145 ir para página                         
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde