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Figure 2 MR-MT Temporal and Spatial Circumferential Strain Maps for a Normal Subject and a Subject With Cardiomyopathy and Dyssynchrony
In the normal subject, the progression of the strain versus time (negative strain represents systole) is uniform in each of the 24 segments in each slice (A), and there is synchronous negative strain for each segment along the circumference of the left ventricle (B). In the subject with dyssynchrony and cardiomyopathy, the strain versus time maps show variable timing of contraction (blue arrows = negative strain) and stretch (orange arrows = positive strain) in septal versus lateral segments (C). In this subject, some segments have positive strain (stretch) and others have negative strain (contraction) during systole (D). See Online Video. Abbreviation as in Figure 1.
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