Blood Flow Velocity
Mostrando 13-24 de 209 artigos, teses e dissertações.
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13. Hemodynamic effects of mannitol infusion in patients with acute intracerebral hemorrhage
PURPOSE: To evaluate hemodynamic effects of mannitol infusion in patients with acute intracerebral hemorrhage. METHODS: Thirty patients with acute intracerebral hemorrhage were enrolled. Transcranial doppler was used to detect variables of bilateral middle cerebral arteria (MCA) including mean velocity (Vm) and pulsitility index (PI) before and after125ml an
Acta Cir. Bras.. Publicado em: 2013-02
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14. 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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15. Doppler venoso fetal na insuficiência placentária: relação com o pH no nascimento / Fetal venous Doppler in pregnancies with placental dysfunction: correlation with pH at birth
OBJECTIVE: This study, conducted in high-risk pregnancies with placental insufficiency, aims to avaliate blood flow in the fetal left portal vein (LPV), umbilical vein (UV) and ductus venosus (DV), and establish which parameters are associated with acidemia at birth. METHOD: A prospective research involving 58 pregnant women, classified according to the pres
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/04/2012
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16. Is the measurement of inferior thyroid artery blood flow velocity by color-flow Doppler ultrasonography useful for differential diagnosis between gestational transient thyrotoxicosis and Graves' disease? A prospective study
OBJECTIVE: To determine the role of peak systolic velocity, end-diastolic velocity and resistance indices of both the right and left inferior thyroid arteries measured by color-flow Doppler ultrasonography for a differential diagnosis between gestational transient thyrotoxicosis and Graves' disease during pregnancy. METHODS: The right and left inferior thyro
Clinics. Publicado em: 2012
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17. Estudo da perfusão miocárdica e reserva coronariana pela ecocardiografia sob estresse com perfusão em tempo real em pacientes com diabetes melito descompensado e após tratamento / Myocardial perfusion study and coronary flow reserve by real-time utilizing myocardial contrast echocardiography in decompensated diabetic patients after treatment
Background: Diabetes mellitus (DM) is associated with alterations in coronary flow reserve on microvascular circulation. Real-time myocardial contrast echocardiography has proven to be a useful method for non-invasive evaluation of microvascular alterations. The objective of this study was to assess whether the control of diabetes would influence the values
Publicado em: 2010
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18. Avaliação não-invasiva das propriedades da parede arterial em pacientes com doença de Behçet / Non-invasive evaluation of arterial wall properties in patients with Behçets disease
INTRODUÇÃO: O envolvimento vascular tem sido reconhecido como uma importante causa de morbidade e mortalidade na Doença de Behçet (DB), mas a importância de métodos não-invasivos em identificar lesões vasculares precoces ainda não foi bem estabelecida. OBJETIVO: Avaliar as propriedades estruturais e funcionais dos vasos na DB utilizando a medida da
Publicado em: 2010
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19. Estudo da maturação da resposta vascular da artéria mesentérica superior em recém-nascidos prematuros através do dopplerfluxometria / Evolution of superior mesenteric artery blood flow by means of doppler velocimetry in health premature neonates
INTRODUCTION: The knowledge of the normal values of indices of Doppler velocimetry of the superior mesenteric artery in healthy premature neonates may help to prevent feeding intolerance situations and necrotizing enterocolitis. METHODS: In order to describe the indices for evaluation of Doppler velocimetry of the superior mesenteric artery in healthy premat
Publicado em: 2009
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20. O ecocardiograma como preditor de variáveis hemodinâmicas nas cardiopatias congênitas com hipertensão pulmonar e nos candidatos a transplante cardíaco / Echocardiographyc estimates of hemodynamic parameters in pulmonary hypertension associated with congenital cardiac shunts or cardiomyopathy
Pulmonary hypertension is defined as a mean pulmonary arterial pressure of >25 mmHg registered at rest, during cardiac catheterization. A number of conditions have been demonstrated to cause pulmonary hypertension, including congenital (septal defects) and acquired heart diseases, chronic lung disease, connective-tissue disease, thromboembolic disorders, sch
Publicado em: 2009
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21. Acurácia da ecocardiografia com estudo da perfusão miocárdica na avaliação de viabilidade em pacientes com disfunção ventricular esquerda crônica submetidos à revascularização / Real-time perfusion echocardiography accuracy for detecting viability in chronic left ventricular dysfunction undergoing myocardial revascularization
BACKGROUND: Real-time perfusion echocardiography (RTPE) is an emerging modality for assessing myocardial perfusion and allows noninvasive quantification of regional myocardial blood flow. Little is known about the accuracy of the RTPE for the assessment of myocardial viability and the possibility of prediction of quality of life improvement after myocardial
Publicado em: 2009
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22. RelaÃÃo dos achados endoscÃpicos e dopplerfluxomÃtricos na colopatia da hipertensÃo porta da esquistossomose mansÃnica: estudo longitudinal
The relationship between colonoscopic features, histopathologic changes and Doppler ultrasound measurements in colonic mucosal, in patients with hepatosplenic schistosomiasis, before and after splenectomy and ligature of the left gastric vein was analysed. The study was performed using colonoscopy and Doppler ultrasonography. Sixteen patients were divided in
Publicado em: 2009
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23. Avaliação funcional do endotelio venoso e arterial em pacientes com hipertensão arterial refrataria / Functional evaluation of venous and arterial endothelium in patients with refractory hypertension
Refractory Hypertension (RH) is conventionally defined as a persistent elevation in blood pressure (systolic >140 or diastolic >90 mmHg), even on a triple drug regimen at maximal doses including a diuretic, in patients with good adhesion and without secondary causes of hypertension or pseudo-hypertension. When exposed to risk factors, such as hypertension, t
Publicado em: 2009
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24. Métodos para quantificação da artéria carótida em imagens de ultrassom modo-B e Doppler. / Methods for quantification of the carotid artery in B-mode and Doppler ultrasound images.
No campo da medicina diagnóstica através de imagens, o baixo custo e a característica não-invasiva da ultrassonografia modo-B favoreceram as pesquisas que analisam a relação entre a espessura íntima-média (EIM) da artéria carótida e o desenvolvimento de doenças cardiovasculares. Outra técnica de ultrassonografia, baseada no efeito Doppler, també
Publicado em: 2009