Impact of bi-planar localization of the tricuspid valve on the evaluation of right ventricular functional parameters in
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ORIGINAL PAPER
Impact of bi‑planar localization of the tricuspid valve on the evaluation of right ventricular functional parameters in the short axis plane Matthieu Demeyere1 · Benjamin Dubourg1,2 · David Delacour1 · Sofiane Bejar1 · Paul Michelin1 · Jean‑Nicolas Dacher1,2 Received: 14 May 2020 / Accepted: 13 July 2020 © Springer Nature B.V. 2020
Abstract Primary objective was to evaluate by cardiac MRI the accuracy of right ventricular stroke volume (RVSV) measurement in the short-axis (SA) plane with cross-referencing of the tricuspid plane. 2D phase-contrast measurement at the main pulmonary artery (PSV) was the reference. Secondary objective was to analyze the reproducibility of RV functional parameters. In this single-center retrospective study, 41 patients (mean age 40 ± 18 years; age range 16–71 years; M/F sex ratio 51%) referred for various acquired and congenital cardiopathies underwent CMR including SA balanced steady state free precession imaging (b-SSFP). Right ventricular vertical long-axis and four chamber views were used for cross-referenced localization of the tricuspid valve. Right ventricular functional parameters were measured on three occasions by two observers using Syngo Via® (Siemens Healthineers, Erlangen, Germany). The Student t-test and Bland Altman plot were used to test for differences between RV stroke volumes derived from cine b-SSFP (RVSV) or 2D PC (PSV). Bland Altman plots, coefficient of variation (COV) and intraclass correlation coefficient (ICC) were used to evaluate intra- and inter-observer reproducibility of RVSV, RVED and RVES volumes, and RV ejection fraction. There was high correlation (r = 0.94) and no significant difference between RVSV and PSV (83 ± 20 mL vs. 81 ± 21 mL p > 0.05). Intra- (ICC: 0.95; COV: 6.2) and inter-observer reliability (ICC: 0.91; COV: 8.9) of RVSV measurements were excellent. Finally, intra- and inter-observer reproducibility was excellent for RVEF, RVEDV and RVESV. Right ventricular stroke volumes can be routinely derived from SA analysis using cross-referenced localization of the atrioventricular plane. Moreover, all right ventricular systolic function parameters are highly reproducible when using this technique. Keywords Cine magnetic resonance imaging · Heart ventricles · Ventricular function · right · Blood flow velocity Abbreviations b-SSFP Balanced steady-state free precession CMR Cardiovascular magnetic resonance COV Coefficient of variation ICC Intra-class correlation coefficient Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10554-020-01941-2) contains supplementary material, which is available to authorized users. * Jean‑Nicolas Dacher jean‑nicolas.dacher@chu‑rouen.fr 1
2
Department of Radiology, Cardiac MR/CT Unit, Rouen University Hospital, 37 Boulevard Gambetta, 76000 Rouen, France Normandie Univ, UNIROUEN, INSERM U1096, 22 Boulevard Gambetta, 76000 Rouen, France
PSV Pulmonary stroke volume measured with PC-MRI RV Right ventricle RVLA Right ventricle vertical long-a
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