Figure 5.

Left Ventricular Morphology and Longitudinal Strain After MIRTH in a Cardiomyopathic Ventricle

Four-chamber cardiac magnetic resonance (CMR) (A and B) before and (C and D) after MIRTH (Myocardial Intramural Remodeling by Transvenous Tether). Left ventricular dimensions are reduced at the level of the implant (double-headed arrows) in (A vs C) diastole and (B vs D) systole. In the same animal, regional longitudinal strain is depicted on (E and G) 16-segment bull’s-eye diagrams and (F and H) color-overlay CMR strain images at end-systole before and after MIRTH. The midventricular implant improved remote longitudinal strain at the base and ventricular apex and reduced local strain surrounding the implant (solid circle).