Right ventricular free wall longitudinal strain and strain rate quantification with cardiovascular magnetic resonance ba
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ORIGINAL PAPER
Right ventricular free wall longitudinal strain and strain rate quantification with cardiovascular magnetic resonance based tissue tracking Yang‑Yang Qu1,2 · Hao Li1 · Wolfgang Rottbauer1 · Gen‑Shan Ma2,3 · Dominik Buckert1 · Volker Rasche1 Received: 15 November 2019 / Accepted: 21 May 2020 © The Author(s) 2020
Abstract Cardiovascular magnetic resonance based tissue tracking (CMR-TT) was reported to provide detailed insight into left ventricular mechanical features. However, inadequate knowledge of the right ventricle (RV) mechanical deformation has been acquired by this advanced technique so far. It was the aim of this study to establish reference values of RV free wall (RVFW) global, regional and segmental longitudinal peak strain and strain rate (LS and LSR), and to investigate the gender- and age-related difference as well as the base-to-apex gradient of RVFW-LS and LSR with CMR-TT. 150 healthy volunteers (75 males/females) were retrospectively and continuously recruited and subdivided into three age groups ( G20–40, G41–60 and G61–80). RVFW global, regional (basal, middle-cavity and apical) and segmental LS (GLS, RLS, SLS) along with systolic and diastolic LSR were generated by post-hoc CMR-TT analysis of standard steady-state free precession long-axis four-chamber view cine images acquired at 1.5T field strength. The reference value of myocardial RVFW-GLS was − 24.9 ± 5.2%. We found that females showed more negative GLS than males except in the youngest group, and no age-related difference of GLS was observed in both gender groups. RLS and SLS presented with the same age-related tendency as GLS. The basal and middle-cavity LS were similar between each other and significantly larger than apical LS. RVFW-GLSR resulted as − 1.73 ± 0.58 s−1 and 1.69 ± 0.65 s−1 during systolic and diastolic phases, respectively. The diastolic GLSR of males tended to decline with the ageing and was significantly lower than that of females in G61–80 group. Regional and segmental LSR showed significant gender-related differences in certain basal and apical region/segments without any age-related effects. CMR-TT overcomes the difficulty in measuring RV global and segmental deformation. The establishment of the vendor-, gender- and segment-specific reference values of RVFW-LS and LSR is essential for the rapid and efficient utilization of CMR-TT modality in the clinical routine. Keywords Cardiovascular magnetic resonance · Tissue tracking · Right ventricle · Strain · Strain rate
Volker Rasche and Dominik Buckert shared corresponding authorship.
Abbreviations ANOVA Analysis of variance AUC Area under the curve BMI Body mass index BSA Body surface area
* Dominik Buckert dominik.buckert@uniklinik‑ulm.de
Gen‑Shan Ma [email protected]
* Volker Rasche volker.rasche@uni‑ulm.de
1
Yang‑Yang Qu [email protected]
Internal Medicine II, Ulm University Medical Center, Ulm, Germany
2
Medical School of Southeast University, Nanjing, China
3
Department of Cardiology, Zhongda Hospital, Southeast
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