Using cardiac magnetic resonance and computational modelling to assess the systemic right ventricle following different Norwood procedures: a dual centre study

Results Figure 1 shows the results of the three dimensional shape analysis. Those receiving a RVPA shunt had highly significant differences (p <0.00001) in remodelling of the RV corresponding to ventricular dilatation (p = 0.001) and increased sphericity (p = 0.006). Differences were evident only after scarring had occurred. Despite preserved ejection fraction in both groups, in the RVPA shunt group functional strain was reduced across multiple ventricular axes including: reduced systolic longitudinal function (strain rate p < 0.0001); reduced diastolic longitudinal function (strain rate p = 0.0001); and reduced midventricular systolic circumferential function (strain p < 0.0001).