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Published in: European Radiology 9/2019

01-09-2019 | Magnetic Resonance Imaging | Cardiac

Clinical usefulness of right ventricular 3D area strain in the assessment of treatment effects of balloon pulmonary angioplasty in chronic thromboembolic pulmonary hypertension: comparison with 2D feature-tracking MRI

Authors: Masateru Kawakubo, Yuzo Yamasaki, Takeshi Kamitani, Koji Sagiyama, Yuko Matsuura, Takuya Hino, Kohtaro Abe, Kazuya Hosokawa, Hidetake Yabuuchi, Hiroshi Honda

Published in: European Radiology | Issue 9/2019

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Abstract

Objectives

To evaluate the usefulness of right ventricular (RV) area strain analysis via cardiac MRI (CMRI) as a tool for assessing the treatment effects of balloon pulmonary angioplasty (BPA) in inoperable chronic thromboembolic pulmonary hypertension (CTEPH), RV area strain was compared to two-dimensional (2D) strain with feature-tracking MRI (FTMRI) before and after BPA.

Methods

We retrospectively analyzed 21 CTEPH patients who underwent BPA. End-systolic global area strain (GAS), longitudinal strain (LS), circumferential strain (CS), and radial strain (RS) were measured before and after BPA. Changes in GAS and RV ejection fraction (RVEF) values after BPA were defined as ΔGAS and ΔRVEF. Receiver operating characteristic (ROC) analyses were performed to determine the optimal cutoff of the strain at after BPA for detection of improved patients with decreased mean pulmonary artery pressure (mPAP) less than 30 mmHg and increased RVEF more than 50%.

Results

ROC analysis revealed the optimal cutoffs of strains (GAS, LS, CS, and RS) for identifying improved patients with mPAP < 30 mmHg (cutoff (%) = − 41.2, − 13.8, − 16.7, and 14.4: area under the curve, 0.75, 0.56, 0.65, and 0.75) and patients with RVEF > 50% (cutoff (%) = − 37.2, − 29.5, − 2.9, and 14.4: area under the curve, 0.81, 0.60, 0.56, and 0.56).

Conclusions

Area strain analysis via CMRI may be a more useful tool for assessing the treatment effects of BPA in patients with CTEPH than 2D strains with FTMRI.

Key Points

Area strain values can detect improvement of right ventricular (RV) pressure and function after balloon pulmonary angioplasty (BPA) equally or more accurately than two-dimensional strains.
Area strain analysis is a useful analytical method that reflects improvements in complex RV myocardial deformation by BPA.
Area strain analysis is a robust method with reproducibility equivalent to that of 2D strain analysis.
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Metadata
Title
Clinical usefulness of right ventricular 3D area strain in the assessment of treatment effects of balloon pulmonary angioplasty in chronic thromboembolic pulmonary hypertension: comparison with 2D feature-tracking MRI
Authors
Masateru Kawakubo
Yuzo Yamasaki
Takeshi Kamitani
Koji Sagiyama
Yuko Matsuura
Takuya Hino
Kohtaro Abe
Kazuya Hosokawa
Hidetake Yabuuchi
Hiroshi Honda
Publication date
01-09-2019
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 9/2019
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-019-6008-3

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