Abstract
and contact mapping system (Ensite solutions inc, ESI) were performed just before creation of infarction and repeated 4 weeks after. Parasternal short axis view (SAX) images at basal, mid and apical levels were acquired. Left ventricular ejection fraction (LVEF), LV systolic wall thickening (SWT) were calculated. RS was analyzed using offline analysis system (GE Echopac). Myocardial infarct size (IS) was obtained from ESI mapping system. Results: A total of 7 animals survived the surgery (4 in distal LAD and 3 in distal LCX territories). LVEF was 57.81±2.61% before and 49.27±6.02% post MI (p < 0.05). Compared to baseline, RS, SWT in the infarcted wall segments at 4 weeks post MI were reduced by 77.72±9.89%, 74.69±15.17% respectively. RS correlated well with IS (r = 0.771, p < 0.05) and SWT (r = 0.763, p < 0.05). Conclusion: 2D-radial strain provides an accurate assessment of the left ventricular regional systolic function. Specifically, it is useful for quantifying and detecting myocardial infarction.
Published Version
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