reproducibilidad del strain longitudinal global del ventrÃculo izquierdo por ecocardiografÃa bidimensional speckle tracking: estudio longitudinal de salud del adulto (elsa-brasil)
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2017
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Abstract
Resumen: Introducción: Se han propuesto técnicas ecocardiográficas avanzadas como el strain longitudinal global por ecocardiografÃa bidimensional speckle tracking para la detección de alteraciones precoces de la función sistólica del ventrÃculo izquierdo. La evaluación de la reproducibilidad del strain longitudinal global es fundamental para su aplicación clÃnica en diferentes escenarios. Objetivo: Estimar la reproducibilidad del strain longitudinal global del ventrÃculo izquierdo en individuos de un estudio de cohorte del Brasil. Métodos: La reproducibilidad del strain longitudinal global del ventrÃculo izquierdo fue evaluada mediante lectura y análisis de imágenes de ecocardiografÃa de una muestra aleatoria de 50 participantes de la lÃnea de base del Estudio Longitudinal de Salud del Adulto (ELSA-Brasil). Resultados: Los participantes tenÃan una edad promedio de 49,7 ± 7,3 años, 54% eran mujeres y la media del strain longitudinal global fue â19,5% ± 1,9%. La reproducibilidad interobservador de la medida del strain longitudinal global mostró un coeficiente de variación de 7,4% y un coeficiente de correlación intraclase de 0,76 (IC 95%: 0,61, 0,86). El análisis del acuerdo interobservador de las medidas del strain longitudinal global mediante el método de Bland & Altman evidenció un promedio de diferencias de 0,1% ± 1,4% y unos lÃmites de acuerdo superior de 2,9 e inferior de â2,7. Conclusiones: Hubo una reproducibilidad adecuada de las medidas del strain longitudinal global del ventrÃculo izquierdo en participantes del ELSA-Brasil y los valores fueron similares a los reportados en otros estudios epidemiológicos longitudinales. Los hallazgos refuerzan la utilidad del strain longitudinal global como un Ãndice clÃnico de deformación miocárdica, capaz de detectar alteraciones subclÃnicas de la contractilidad miocárdica. Abstract: Introduction: Advanced echocardiography techniques, such as the global longitudinal strain using two-dimensional ultrasound speckle tracking, have been proposed for the detection of early changes in the left ventricular systolic function. The evaluation of the reproducibility of left ventricular global longitudinal strain is essential for its clinical application in different scenarios. Objective: To determine the reproducibility of left ventricular global longitudinal strain in individuals from a Brazil cohort study. Methods: The reproducibility of left ventricular global longitudinal strain was evaluated by the reading and analysis of echocardiograph images of a random sample of 50 participants of the baseline Longitudinal Study of Adult Health (ELSA-Brasil). Results: The mean age of the participants was 49.7 ± 7.3 years, of whom 54% were women, and the mean global longitudinal strain was â19.5% ± 1.9%. The inter-observer reproducibility of the mean global longitudinal strain, had a coefficient of variation of 7.4%, and an intra-class correlation of 0.76 (95% CI: 0.61 â 0.86). The analysis of the inter-observer agreement of the global longitudinal strain measurements using the Bland and Altman method showed a mean differences of 0.1% ± 1.4%, and upper and lower limits of agreement of 2.9 and â2.7, respectively. Conclusions: There was adequate reproducibility of the left ventricular global longitudinal strain measurements in participants of the ELSA-Brasil study, and the values were similar to those reported in other longitudinal epidemiological studies. The findings reinforce the use of the global longitudinal strain as a clinical marker of myocardial deformation, capable of detecting subclinical changes in myocardial contractility. Palabras clave: Reproducibilidad de resultados, Strain longitudinal, Contracción miocárdica, EcocardiografÃa, Keywords: Reproducibility of results, Longitudinal strain, Myocardial contraction, Echocardiography
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caon-montaez2017revistareproducibilidad
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| Authors | ;Wilson Cañon-Montañez;Angela B.S. Santos;Maria Vitória F. do Amaral;Lisandra Almeida Nunes;Bruce B. Duncan;Maria Inês Schmidt;Murilo Foppa |
| Journal | applied clay science |
| Year | 2017 |
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