Volume 55, Issue 5 pp. 1478-1488
Research Article

Diverse Right Ventricular Remodeling Evaluated by MRI and Prognosis in Eisenmenger Syndrome With Different Shunt Locations

Chao Gong MD

Chao Gong MD

Department of Cardiology, West China Hospital, Sichuan University, Chengdu, PR China

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Shuai He BMSci

Shuai He BMSci

Department of Radiology, West China Hospital, Sichuan University, Chengdu, PR China

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Xiaoling Chen BMSci

Xiaoling Chen BMSci

Department of Cardiology, West China Hospital, Sichuan University, Chengdu, PR China

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Lili Wang BMSci

Lili Wang BMSci

Department of Cardiology, West China Hospital, Sichuan University, Chengdu, PR China

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Jiajuan Guo BMSci

Jiajuan Guo BMSci

Department of Cardiology, West China Hospital, Sichuan University, Chengdu, PR China

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Juan He BMSci

Juan He BMSci

Department of Cardiology, West China Hospital, Sichuan University, Chengdu, PR China

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Lidan Yin BMSci

Lidan Yin BMSci

Department of Cardiology, West China Hospital, Sichuan University, Chengdu, PR China

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Chen Chen MD

Chen Chen MD

Department of Cardiology, West China Hospital, Sichuan University, Chengdu, PR China

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Yuchi Han PhD

Yuchi Han PhD

Department of Medicine (Cardiovascular Division), University of Pennsylvania, Philadelphia, Pennsylvania, USA

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Yucheng Chen MD

Corresponding Author

Yucheng Chen MD

Department of Cardiology, West China Hospital, Sichuan University, Chengdu, PR China

Address reprint requests to: Y.C., Guoxue Xiang No. 37, Chengdu, Sichuan Province 610041, PR China. E-mail: [email protected]

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First published: 21 June 2021
Citations: 6

Chao Gong and Shuai He contributed equally to this work.

Contract grant sponsor: 1.3.5 project for disciplines of excellence, West China Hospital, Sichuan University (ZYJC18013).

Abstract

Background

Congenital shunt location is related to Eisenmenger syndrome (ES) survival. Moreover, right ventricular (RV) remodeling is associated with poor survival in pulmonary hypertension.

Purpose

To investigate RV remodeling using comprehensive magnetic resonance imaging (MRI) techniques and identify its relationship with prognosis in ES subgroups classified by shunt location.

Study Type

Prospective observational study.

Population

Fifty-four adults with ES (16 with pre-tricuspid shunt and 38 with post-tricuspid shunt).

Field Strength/Sequence

3.0 T/cine MRI with balanced steady-state free precession sequence, late gadolinium enhancement with inversion recovery segmented gradient echo sequence and phase-sensitive reconstruction, and T1 mapping with modified Look-Locker inversion recovery sequence.

Assessment

Demographics, clinical characteristics, hemodynamics, RV remodeling features (morphology, systolic function, RV–pulmonary artery (PA) coupling and myocardial fibrosis), and prognosis were compared between ES subgroups. The adverse endpoint was all-cause mortality or readmission for heart failure.

Statistical Tests

The independent samples t-test, Fisher's exact test or Chi-squared test, and the Kaplan–Meier method were used. P < 0.05 was considered significant.

Results

Compared to patients with post-tricuspid shunt, patients with pre-tricuspid shunt were significantly older and had higher N-terminal pro-B-type natriuretic peptide concentrations and poorer exercise tolerance. Pre-tricuspid shunt showed significantly larger RV dimensions (end-diastolic volume index: 185.81 ± 37.49 vs. 98.20 ± 36.26 mL/m2), worse RV ejection fraction (23.54% ± 12.35% vs. 40.82% ± 10.77%), and RV–PA decoupling (0.35 ± 0.31 vs. 0.72 ± 0.29). Biventricular myocardial fibrosis was significantly more severe in pre-tricuspid shunt than post-tricuspid shunt (extracellular volume, left ventricle: 35.85% ± 2.58% vs. 29.10% ± 5.20%; RV free wall: 30.93% ± 5.65% vs. 26.75% ± 5.15%). In addition, pre-tricuspid shunt demonstrated a significantly increased risk of adverse endpoint (hazard ratio: 2.938, 95% confidence interval: 1.204–7.172).

Data Conclusion

ES with pre-tricuspid shunt might be a unique subtype with worse clinically decompensated RV remodeling and poor prognosis.

Level of Evidence: 2

Technical Efficacy Stage: 5

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