What does this research mean for the field?

The normal reference value for right ventricular free wall global longitudinal strain (RVFW-GLS) using cardiovascular magnetic resonance tissue tracking is -24.9 ± 5.2%, with females generally exhibiting more negative strain than males and basal/mid-cavity regions showing greater strain than the apex. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

May 27, 2020Open Access

Right ventricular free wall longitudinal strain and strain rate quantification with cardiovascular magnetic resonance based tissue tracking

Structured PICO

Population

150 healthy volunteers (75 males/females) retrospectively and continuously recruited and subdivided into three age groups (20–40, 41–60 and 61–80)

Intervention

Cardiovascular magnetic resonance based tissue tracking (CMR-TT) analysis of standard steady-state free precession long-axis four-chamber view cine images acquired at 1.5T field strength

Outcome

Reference values of RV free wall (RVFW) global, regional and segmental longitudinal peak strain and strain rate (LS and LSR), and gender- and age-related differencessurrogate

CMR-TT provides feasible quantification of RV global and segmental deformation, establishing gender- and segment-specific reference values for clinical routine.

Abstract

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 (G 20–40 , G 41–60 and G 61–80 ). 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 G 61–80 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.

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