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Published in: The International Journal of Cardiovascular Imaging 1/2021

01-01-2021 | Original Paper

Feature tracking and mapping analysis of myocardial response to improved perfusion reserve in patients with refractory angina treated by coronary sinus Reducer implantation: a CMR study

Authors: Anna Palmisano, Francesco Giannini, Paola Rancoita, Guglielmo Gallone, Giulia Benedetti, Luca Baldetti, Georgios Tzanis, Davide Vignale, Caterina Monti, Francesco Ponticelli, Marco Ancona, Matteo Montorfano, Alessandro Del Maschio, Francesco De Cobelli, Antonio Colombo, Antonio Esposito

Published in: The International Journal of Cardiovascular Imaging | Issue 1/2021

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Abstract

Coronary sinus (CS) Reducer implantation improves myocardial perfusion and symptoms in patients with debilitating refractory angina. Its impact on myocardial remodeling remain uncertain. Aim of the present study was to assess possible impact of CS Reducer on myocardial systolic-diastolic deformation and microstructural remodeling, as assessed through cardiac magnetic resonance (CMR) feature tracking and mapping analysis. Twenty-eight consecutive patients with refractory angina underwent multiparametric stress CMR before and 4 months after CS Reducer implantation. Eight patients were excluded (6 for absence of inducible ischemia, 2 for artifacts). Modifications in 3D systo-diastolic myocardial deformation were evaluated using feature tracking analysis on rest cine images. Myocardial microstructural remodeling was assessed by native T1 mapping, cellular and matrix volume and extracellular volume fraction (ECV). Collaterally, the percentage of ischemic myocardium (ischemic burden %) and the myocardial perfusion reserve index (MPRI) were measured. After CS Reducer implantation, myocardial contractility improved (ejection fraction rose from 61 to 67%; p = 0.0079), along with longitudinal (from − 16 to − 19%; p = 0.0192) and circumferential strain (from − 18 to − 21%; p = 0.0017). Peak diastolic radial, circumferential and longitudinal strain rate did not change (p > 0.05), and no changes in native T1, ECV, cellular and matrix volume were observed. Myocardial perfusion improved, with a reduction of ischemic burden (13–11%; p = 0.0135), and recovery of intramural perfusion balance in segments with baseline ischemia (MPRi endocardial/epicardial ratio from 0.67 to 0.96; p = 0.0107). CS Reducer improves myocardial longitudinal and circumferential strain, without microstructural remodeling and no impact on diastolic proprieties.
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Metadata
Title
Feature tracking and mapping analysis of myocardial response to improved perfusion reserve in patients with refractory angina treated by coronary sinus Reducer implantation: a CMR study
Authors
Anna Palmisano
Francesco Giannini
Paola Rancoita
Guglielmo Gallone
Giulia Benedetti
Luca Baldetti
Georgios Tzanis
Davide Vignale
Caterina Monti
Francesco Ponticelli
Marco Ancona
Matteo Montorfano
Alessandro Del Maschio
Francesco De Cobelli
Antonio Colombo
Antonio Esposito
Publication date
01-01-2021
Publisher
Springer Netherlands
Published in
The International Journal of Cardiovascular Imaging / Issue 1/2021
Print ISSN: 1569-5794
Electronic ISSN: 1875-8312
DOI
https://doi.org/10.1007/s10554-020-01964-9

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