Autoregulation
Mostrando 1-12 de 458 artigos, teses e dissertações.
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1. Risk of perioperative stroke and cerebral autoregulation monitoring: a systematic review
Resumo Antecedentes Acidente vascular cerebral (AVC) perioperatório, delírio e comprometimento cognitivo podem estar relacionados ao manejo e à variações no controle da pressão arterial, à hipoperfusão cerebral, e ao aumento do volume sanguíneo. A autorregulação cerebral (ARC) é um mecanismo para manter a perfusão cerebral por meio do controle
Arquivos de Neuro-Psiquiatria. Publicado em: 2022
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2. Salvinorin A preserves cerebral pial artery autoregulation after forebrain ischemia via the PI3K/AKT/cGMP pathway
This study aimed to investigate the protective effect of salvinorin A on the cerebral pial artery after forebrain ischemia and explore related mechanisms. Thirty Sprague-Dawley rats received forebrain ischemia for 10 min. The dilation responses of the cerebral pial artery to hypercapnia and hypotension were assessed in rats before and 1 h after ischemia. The
Braz J Med Biol Res. Publicado em: 15/03/2018
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3. Autorregulação encefálica durante manobra de preensão manual avaliada pela técnica de autorregressão de médias móveis através do Doppler transcraniano / Cerebral hemodynamic changes assessed by transcranial Doppler ultrasonography during handgrip maneuver
We investigated the effect of handgrip (HG) maneuver on time-varying estimates of dynamic cerebral autoregulation (CA), using the autoregressive moving average (ARMA) technique. Twelve healthy subjects were recruited to perform HG maneuver during 3 minutes with 30% of maximum contraction force. Cerebral blood flow velocity, end-tidal CO2 pressure (PETCO2), a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2012
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4. Estudo do sistema BlaR/Blal e de dois operons codificando sistemas de efluxo RND em Caulobacter crescentus. / Study of the BlaR/BlaI system and two operons encoding RND efflux systems from Caulobacter crescentus.
The aim of this work is to characterize three clusters of genes from the alpha proteobacterium Caulobacter crescentus involved in metal and antibiotics response. We analyzed the cluster comprising genes CC1637-CC1640, which contains a BlaR/BlaI signal transduction system, and we performed a comparative analysis with two RND efflux systems consisting on genes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2012
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5. Hedge funds: análise jurídica no direito brasileiro e comparado / Hedge funds: analyse juridique dans le droit brésilien et comparé
Ce mémoire a pour objet lanalyse et le débat sur le thème des hedge funds, et se concentre à cet égard, sur les principes et les règles de lordre juridique brésilien et accessoirement sur le droit comparé. Le Mémoire débute par la présentation des concepts généraux dêx hedge funds sur la scène internationale, en étudiant, ainsi, les données
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2009
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6. Governança corporativa: análise jurídica dos seus efeitos
O texto é dividido em seis capítulos que buscam explicar o fenômeno da governança corporativa, algo recente e de grande importância nas relações econômicas internacionais. No primeiro capítulo, buscamos contextualizar o momento histórico do surgimento da governança corporativa com a evolução das sociedades anônimas. Em seguida, passamos a demon
Publicado em: 2009
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7. InfluÃncia da adequaÃÃo anestÃsica controlada pelo eeg sobre o estresse oxidativo e metabolismo anaerÃbico em operaÃÃes pelo acesso videolaparoscÃpico / Influence of the controlled anesthetical adequacy for eeg on it estresse oxidativo and anaerÃbico metabolism in operations for the videolaparoscÃpico access
The present study evaluated the influence EEG-monitored depth of anesthesia (BIS, SEF 95%, pEMG and TS) on the blood levels of the metabolites (lactate, piruvate and glucose) of thiobarbituric acid-reactive substances (TBARS) and glutathione in patients submitted to laparascopic surgery. Twenty adult subjects (ASA I, body mass index 20â26, age 20â40 years)
Publicado em: 2008
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8. Sinalização celular durante aumento de tensão no coração : implicações no desenvolvimento de hipertrofia cardiaca : estudos em corações isolados
The mechanical input plays a major role in cardiac adaptive responses to hemodynamic overload. In addition of triggering the force-Iength mechanism and the homeometric autoregulation, the mechanical input activates signaling mechanisms involved on hypertrophic growth of cardiac myocytes, the hal1mark of themyocardial structural adaptation in response to sust
Publicado em: 2002
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9. Autoregulation of cerebral blood flow during controlled hypotension in baboons
The effect of graded, progressive hypotension on the autoregulation of cerebral blood flow was studied in anaesthetised baboons. Progressive hypotension was produced over a period of four to five hours, either by graded haemorrhage or by the administration of increasing concentrations of hypotensive drugs. During haemorrhagic hypotension autoregulation was m
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10. Calcium ion dependence of myogenic renal plasma flow autoregulation: evidence from the isolated perfused rat kidney.
1. The independent roles of Ca2+ and glomerular filtration in the control of renal plasma flow autoregulation were examined in the isolated perfused rat kidney. Control kidneys autoregulated plasma flow between perfusion pressures of 120 and 160 mmHg. 2. Complete ischaemia, induced by clamping of the renal artery cannula for 1 h induced relative vasoconstric
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11. Connexin 40 Mediates the Tubuloglomerular Feedback Contribution to Renal Blood Flow Autoregulation
Connexins are important in vascular development and function. Connexin 40 (Cx40), which plays a predominant role in the formation of gap junctions in the vasculature, participates in the autoregulation of renal blood flow (RBF), but the underlying mechanisms are unknown. Here, Cx40-deficient mice (Cx40-ko) had impaired steady-state autoregulation to a sudden
American Society of Nephrology.
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12. MyoD1 promoter autoregulation is mediated by two proximal E-boxes.
We show that in mouse myoblasts the MyoD1 promoter is highly stimulated by MyoD1 expression, suggesting that it is controlled by a positive feedback loop. Using deletion and mutation analyses, we identified the targets for MyoD1 promoter autoregulation as the two proximal E-boxes located close to the MyoD1 core promoter. Gel mobility shift competition assays