Cardiac Function in a Long-Term Follow-Up Study of Moderate and Severe Porcine Model of Chronic Myocardial Infarction

Figure 2

Schematic overview of strain and 17-segment echocardiography model. (a) Schematic overview of strain analysis. Radial strain represents thickening (systole, arrows outwards) and thinning (diastole, arrows facing each other) of the myocardium during 1 cardiac cycle. Circumferential strain: elongation and shortening (arrows facing each other) of myocardial muscle fibers. (b) Schematic overview of myocardial segments on short axis view at basal level (mitral valve level). A indicates anterior wall. AL: anterolateral wall; IL: inferolateral; I: inferior; IS: inferoseptal; AS: anteroseptal. (c) Schematic overview of short axis view of myocardial segments at mid-ventricular level (papillary muscle level). (d) Schematic view of the apex. The apex only consists of 4 segments. L indicates lateral wall.

(a) Strain

(b) Basal level

(c) Mid-ventricular level

(d) Apical level