Velocitytime Integral
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Síndrome do desconforto respiratório: influência do manejo sobre o estado hemodinâmico de recém-nascidos pré-termo ≤ 32 semanas nas primeiras 24 horas de vida
RESUMO Objetivo: Investigar a influência do manejo da síndrome do desconforto respiratório sobre parâmetros clínicos e ecocardiográficos de avaliação hemodinâmica em recém-nascidos ≤ 32 semanas. Métodos: Foram avaliados prospectivamente 33 recém-nascidos ≤ 32 semanas, submetidos à ventilação mecânica invasiva. A necessidade de surfactan
Rev. bras. ter. intensiva. Publicado em: 14/10/2019
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2. Evaluation of volume responsiveness by pulse pressure variability and inferior vena cava dispensability index at different tidal volumes by mechanical ventilation
This study investigated the effects of tidal volume (TV) on the diagnostic value of pulse pressure variation (PPV) and the inferior vena cava dispensability index (IVC-DI) for volume responsiveness during mechanical ventilation. In patients undergoing elective surgery with mechanical ventilation, different TVs of 6, 9, and 12 mL/kg were given for two min. Th
Braz J Med Biol Res. Publicado em: 29/08/2019
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3. Transthoracic echocardiographic assessment of cardiac output in mechanically ventilated critically ill patients by intensive care unit physicians
Resumo Justificativa e objetivos: A ecocardiografia transtorácica pode ser potencialmente útil para obter uma estimativa rápida, precisa e não invasiva do débito cardíaco. Avaliamos se os intensivistas não cardiologistas podem obter uma determinação precisa e reprodutível do débito cardíaco em pacientes mecanicamente ventilados e hemodinamicamen
Rev. Bras. Anestesiol.. Publicado em: 2019-01
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4. 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
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5. Evaluation of aortic and pulmonary valves flow with pulsed-wave Doppler echocardiography in clinically normal dogs / Avaliação dos fluxos das valvas aórtica e pulmonar com ecocardiografia Doppler pulsátil em cães clinicamente sadios
The purpose of this study was the evaluation of aortic (AO) and pulmonary (Pul) valves flow for the qualitative (valvar insufficiency presence, characteristic of flow profile) and quantitative analysis, obtaining this way chocardiographic parameters as: peak (PV) and mean (MV) velocities, velocity-time integral (VTI), acceleration (AT) and ejection (ET) time
Publicado em: 2006
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6. One-year follow-up of the effects of sildenafil on pulmonary arterial hypertension and veno-occlusive disease
We hypothesized that chronic oral administration of the phosphodiesterase-5 inhibitor sildenafil could improve the exercise capacity and pulmonary hemodynamics in patients with pulmonary arterial hypertension (PAH) on the basis of previous short-term studies. We tested this hypothesis in 14 subjects with PAH, including seven patients with the idiopathic form
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-02
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7. Echocardiographic Assessment of the Pulmonary Venous Flow: An Indicator of Increased Pulmonary Flow in Congenital Cardiac Malformations
OBJECTIVE: To identify the left inferior pulmonary vein as an indirect marker of increased pulmonary flow in congenital heart diseases.METHODS: We carried out a prospective consecutive study on 40 patients divided into 2 groups as follows: G1 - 20 patients diagnosed with congenital heart disease and increased pulmonary flow; G2 (control group) - 20 patients
Arquivos Brasileiros de Cardiologia. Publicado em: 2002-06
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8. Assessment of changes in blood flow through the lungs and foramen ovale in the normal human fetus with gestational age: a prospective Doppler echocardiographic study.
OBJECTIVE--To measure lung blood flow and flow through the foramen ovale in the normal human fetus and to assess the changes in each with gestational age and the proportions of combined ventricular output that the respective flows represent. PATIENTS AND DESIGN--38 normal fetuses (gestational age 18-37 weeks) were studied prospectively with Doppler echocardi