Flow dynamics of type II endoleaks can determine sac expansion after endovascular aneurysm repair using four-dimensional flow-sensitive magnetic resonance imaging analysis

Journal of Vascular Surgery
Kazuto KatahashiNaoki Unno

Abstract

The objective of this study was to investigate the hemodynamic parameters of type II endoleaks (T2ELs) to predict sac expansion using four-dimensional flow-sensitive magnetic resonance imaging (4D-flow MRI) analysis. Patients who underwent endovascular aneurysm repair (EVAR) and were diagnosed with a T2EL were included in the study. Using 4D-flow MRI at 7 days, the peak flow velocity and amplitude of dynamics of blood flow per minute were measured in each T2EL vessel. The peak flow velocity was defined as the maximum of the absolute value of the blood flow velocity. The amplitude of dynamics of blood flow in the tributary arteries was defined as the sum of the absolute values of the inflow and outflow volume in each vessel. The amplitude of dynamics of blood flow in the tributary arteries per sac was calculated in each sac. The aneurysm sac diameter was measured by computed tomography (CT) at 1 year. The patients were divided into two groups according to the presence or absence of sac expansion. Of 155 patients who underwent EVAR, both CT angiography and 4D-flow MRI were performed in 107 patients at 7 days after EVAR. Among them, 39 (36.4%) were found to have a T2EL, of whom 28 were re-evaluated with CT angiography and 4D-flow ...Continue Reading

Citations

Jul 17, 2020·La Radiologia medica·Yasuo Takehara
Oct 13, 2020·Seminars in Interventional Radiology·Stephanie H Kim, Harold I Litt
Mar 2, 2021·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·Jiarong WangTiehao Wang
Jun 6, 2021·CVIR Endovascular·Álvaro Torres-Blanco, Manuel Miralles-Hernández
Nov 28, 2021·Abdominal Radiology·Thekla H OechteringScott B Reeder

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