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• W2894801432 abstract "Transthoracic echocardiography may potentially be useful to obtain a prompt, accurate and non-invasive estimation of cardiac output. We evaluated whether non-cardiologist intensivists may obtain accurate and reproducible cardiac output determination in hemodynamically unstable mechanically ventilated patients. We studied 25 hemodynamically unstable mechanically ventilated intensive care unit patients with a pulmonary artery catheter in place. Cardiac output was calculated using the pulsed Doppler transthoracic echocardiography technique applied to the left ventricular outflow tract in apical 5 chamber view by two intensive care unit physicians who had received a basic Transthoracic Echocardiography training plus a specific training focused on Doppler, left ventricular outflow tract and velocity-time integral determination. Cardiac output assessment by transthoracic echocardiography was feasible in 20 out of 25 enrolled patients (80%) and showed an excellent inter-operator reproducibility (Pearson correlation test r = 0.987; Cohen's K = 0.840). Overall, the mean bias was 0.03 L.min−1, with limits of agreement −0.52 and +0.57 L.min−1. The concordance correlation coefficient (ρc) was 0.986 (95% IC 0.966–0.995) and 0.995 (95% IC 0.986–0.998) for physician 1 and 2, respectively. The value of accuracy (Cb) of COTTE measurement was 0.999 for both observers. The value of precision (ρ) of COTTE measurement was 0.986 and 0.995 for observer 1 and 2, respectively. A specific training focused on Doppler and VTI determination added to the standard basic transthoracic echocardiography training allowed non-cardiologist intensive care unit physicians to achieve a quick, reproducible and accurate snapshot cardiac output assessment in the majority of mechanically ventilated intensive care unit patients. 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 hemodinamicamente instáveis. Avaliamos 25 pacientes em unidade de terapia intensiva, mecanicamente ventilados, hemodinamicamente instáveis, com cateteres de artéria pulmonar posicionados. O débito cardíaco foi calculado usando a técnica de ecocardiografia transtorácica com Doppler pulsátil aplicada à via de saída do ventrículo esquerdo no corte apical (5-câmaras) por dois médicos intensivistas que receberam treinamento básico em ecocardiografia transtorácica e treinamento específico focado em Doppler, via de saída do ventrículo esquerdo e determinação da integral de tempo-velocidade. A avaliação do débito cardíaco pelo ecocardiograma transtorácico foi factível em 20 dos 25 pacientes inscritos (80%) e mostrou excelente reprodutibilidade entre operadores (teste de correlação de Pearson r = 0,987; K de Cohen = 0,840). No geral, o viés médio foi de 0,03 L.min−1, com limites de concordância de −0,52 e +0,57 L.min−1. O coeficiente de correlação de concordância (ρc) foi 0,986 (95% IC 0,966–0,995) e 0,995 (95% IC 0,986–0,998) para os médicos 1 e 2, respectivamente. O valor de precisão (Cb) da mensuração de COTTE foi de 0,999 para ambos os observadores. O valor de precisão (ρ) da mensuração de COTTE foi de 0,986 e 0,995 para os observadores 1 e 2, respectivamente. Um treinamento específico focado na determinação do Doppler e VTI, adicionado ao treinamento padrão em ecocardiografia transtorácica básica, permitiu que médicos não cardiologistas da unidade de terapia intensiva obtivessem uma avaliação rápida, reprodutível e precisa do débito cardíaco instantâneo na maioria dos pacientes mecanicamente ventilados em unidade de terapia intensiva." @default.
• W2894801432 created "2018-10-12" @default.
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• W2894801432 date "2019-01-01" @default.
• W2894801432 modified "2023-09-27" @default.
• W2894801432 title "Transthoracic echocardiographic assessment of cardiac output in mechanically ventilated critically ill patients by intensive care unit physicians" @default.
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• W2894801432 doi "https://doi.org/10.1016/j.bjane.2018.09.003" @default.
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