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Figure 2 Example circumferential strain curves over time for one septal segment and one lateral segment of a mid ventricular slice, showing the definitions of the several timing parameters. (A) Healthy subject, showing synchronous shortening. (B) Nonischemic patient with multiple shortening waves in the septum, leading to a first peak and a maximum peak of shortening. AL = anterolateral; AS = anteroseptal; ECG = electrocardiogram; IL = inferolateral; IS = inferoseptal; Tonset = onset time of shortening; Tpeak,first = time to first peak of shortening; Tpeak,max = time to maximum peak of shortening.
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