Cardiac magnetic resonance tissue tracking in right ventricle: Feasibility and normal values

Publication date: May 2017
Source:Magnetic Resonance Imaging, Volume 38
Author(s): Vien T Truong, Komal S Safdar, Dinesh K Kalra, Xuexin Gao, Stephanie Ambach, Michael D Taylor, Ryan Moore, Robin J Taylor, Joshua Germann, Olga Toro-Salazar, John L Jefferies, Cheryl Bartone, Subha V Raman, Tam Ngo, Wojciech Mazur
PurposeTo investigate right ventricular (RV) strain in patients without identified cardiac pathology using cardiac magnetic resonance tissue tracking (CMR TT).MethodsA total of 50 consecutive patients with no identified cardiac pathology were analyzed. RV longitudinal and circumferential strain was assessed by CMR TT. The age range was 4–81years with a median of 32years (interquartile range, 15 to 56years).ResultsAnalysis time per patient was <5min. The peak longitudinal strain (Ell) was −22.11±3.51%. The peak circumferential strains (Ecc) for global, basal, mid-cavity and apical segments were as follows: −11.69±2.25%, −11.00±2.45%, −11.17±3.36%, −12.90±3.34%. There were significant gender differences in peak Ecc at the base (P=0.04) and the mid-cavity (P=0.03) with greater deformation in females than in males. On Bland-Altman analysis, peak Ell (mean bias, 0.22±1.67; 95% CI −3.05 to 3.49) and mid-cavity Ecc (mean bias, 0.036±1.75; 95% CI, −3.39 to 3.47) had the best intra-observer agreement and inter-observer agreement, respectively.ConclusionsRV longitudinal and circumferential strains can be quickly assessed with good intra-observer and inter-observer variability using TT.



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