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
Article
in English
| LILACS
| ID: biblio-1020508
Responsible library:
BR1.1
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.
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Aorta
/
Magnetic Resonance Imaging
/
Aortic Aneurysm, Thoracic
/
Aortic Dissection
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Language:
English
Journal:
Rev. bras. cir. cardiovasc
Journal subject:
Cardiology
/
CIRURGIA GERAL
Year:
2019
Document type:
Article
Affiliation country:
Italy
/
Nepal
Institution/Affiliation country:
College of Medical Sciences/NP
/
Fondazione Toscana Gabriele Monasterio (FTGM)/IT
/
Instituto Clinico Sant Ambrogio/IT