Additionally, using cardiac magnetic resonance imaging (CMR), Courties et al. showed that although infarct size was not different between the si-IRF5 treatment group and the control group at Day 1 post-AMI, the si-IRF5 treatment group developed less left ventricular dilatation three weeks post-AMI as compared to the control group. This evidence concerns the gene IRF5 and Left ventricular dilatation.