Functional magnetic resonance imaging in the evaluation of the elastic properties of ascending aortic aneurysm
Rev. bras. cir. cardiovasc
;
34(4): 451-457, July-Aug. 2019. tab, graf
Artigo
em Inglês
| LILACS
| ID: biblio-1020508
ABSTRACT
Abstract Objective: To evaluate the aortic wall elasticity using the maximal rate of systolic distension (MRSD) and maximal rate of diastolic recoil (MRDR) and their correlation with the aortic size index (ASI). Methods: Forty-eight patients with thoracic aortic aneurysm were enrolled in this study. A standard magnetic resonance imaging (MRI) protocol was used to calculate MRSD and MRDR. Both MRSD and MRDR were expressed as percentile of maximal area/10-3 sec. ASI (maximal aortic diameter/body surface area) was calculated. A correlation between MRSD, MRDR, ASI, and the patient's age was performed using regression plot. Results: A significant correlation between MRSD (t=-4,36; r2=0.29; P≤0.0001), MRDR (t=3.92; r2=0.25; P=0.0003), and ASI (25±4.33 mm/m2; range 15,48-35,14 mm/m2) is observed. As ASI increases, aortic MRSD and MRDR decrease. Such inverse correlation between MRSD, MRDR, and ASI indicates increased stiffness of the ascending aorta. A significant correlation between the patient's age and the decrease in MRSD and MRDR is observed. Conclusion: MRSD and MRDR are significantly correlated with ASI and the patient's age. They seem to describe properly the increasing stiffness of aortas. These two new indexes provide a promising, accessible, and reproducible approach to evaluate the biomechanical property of the aorta.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Aorta
/
Imageamento por Ressonância Magnética
/
Aneurisma da Aorta Torácica
/
Dissecção Aórtica
Limite:
Adulto
/
Idoso
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Rev. bras. cir. cardiovasc
Assunto da revista:
Cardiologia
/
Cirurgia Geral
Ano de publicação:
2019
Tipo de documento:
Artigo
País de afiliação:
Itália
/
Nepal
Instituição/País de afiliação:
College of Medical Sciences/NP
/
Fondazione Toscana Gabriele Monasterio (FTGM)/IT
/
Instituto Clinico Sant Ambrogio/IT
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