Objective: Assessment of Right Ventricluar (RV) strain by cardiac magnetic resonance (CMR) imaging may add prognostic information, beyond global RV function in patients with pulmonary hypertension, right sided valvular pulmonary tricuspid regurgitation, and complex congenital heart disease. Currently echocardiography is the main modality to assess RV strain and is limited to RV free wall.Methods: Dedicated RV Myocardial Strain Software: Myocardial deformation recovery from the cine MRI first involves constructing a deformable model based on the endocardial and the epicardial tracing in the reference frame, assuming the myocardium is nearly incompressible. In each of the subsequent frames the displacements of the control points of the model are determined using feature tracking method with the incompressible model constraint. Using this method, not only the myocardial boundaries, but the entire myocardial tissue is tracked. CMR of 37 patients without known cardiac pathology and preserved biventricular function were analyzed retrospectively.Strain analysis: Horizontal long axis was used for calculation of longitudinal strain (fig 1). Short axis at the base, mid and apex of the RV was used to calculate circumferential strain (fig 2). Intraventricular septum was not included in the strain calculation. Endocardial and epicardial contours were drawn in the phase with most distinct myocardium boundaries; RV trabeculations were carefully excluded. The software automatically propagated contours throughout all phases. Longitudinal (Ell) and circumferential strain (Ecc) was computed.Results: The age range was 4-72 years with an average of 31 (± 20.69). Analysis time per patient was < 5 minutes. Average Ell was -21.92 (± 3.42). Average Ecc for basal, mid and apical segments were as follows: -10.60 (±3.42), -10.94 (± 3.68), -11.84 (±3.28). There was no significant difference between the basal, mid and apical levels. The intraclass correlation coefficient (ICC) was 0.785 for Ell, and 0.877, 0.943, and 0.902 respectively for the Ecc at the base, mid, and apical levels. There was no correlation between age and strain.Conclusion: Rapid analysis of RV Ell and Ecc can be accomplished with excellent intraobserver variability. Further studies are needed to determine performance and utility of this dedicated RV Deformation Recovery Strain software in the clinical settings.(Equation is included in full-text article.)(Equation is included in full-text article.)