Fig. 1

Speckle tracking echocardiography. Zoom image of myocardial ultrassonographic appearance, with the speckles (a). Main orientations of LV contration: R, radial; C, circumferential; L, longitudinal (b). Representation of LV twist – clockwise rotation at the basis and counterclockwise at the apex (c). Example of myocardial mechanics analysis (d)