Figure 3.

Left ventricular (LV) motion and deformation during diastole and systole. Systole involves myocardial motion and deformation along three measurable vectors that result in LV shortening in the longitudinal axis, and thickening along both the radial and circumferential directions (A). Additionally, the complex myofiber arrangement facilitates LV systolic twisting and diastolic untwisting (recoil). This constitutes LV torsion or “wringing” (B). Speckle tracking images of these motions were demonstrated.