Mechanical Strain Analysis of Regional Wall Motion on Interventricular Septal Section by DANTE-tagging Cine MRI

To accurately evaluate regional septal wall motion using the mechanical strain analyzing method on the interventricular septal section, DANTE-tagging cine MRI was performed in 4 normal volunteers,3 patients with anteroseptal myocardial infarction and 1 patient with dilated cardiomyopathy. Although the %shortening and %strain curves showed complex patterns, the megn %contraction (changes of ROI area) was 72.7±2.8%, and the %contraction curve of any ROI was smooth in normal subjects. In patients with heart diseases, the %contraction was generally lower than that of normal volunteers, and expansion was shown in some patients. The patterns of %shortening and %strain curves were also complicated. In conclusion, the DANTE-tagging method is useful for accurate evaluation of regional wall motion in detail.