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Figure 5 Global Strain Rate Profile

Global strain rate (SR) signal (purple, right axis), and mitral velocity (left axis) tracings by color tissue Doppler from the septal (blue) and lateral side (red) of the mitral annulus from the same cardiac cycle. Note the SR signal during the isovolumic relaxation phase of the cardiac cycle (*) and the corresponding velocity tracings from the mitral annulus recording during the same interval. Aa = late diastolic velocity; AVC = aortic valve closure; Ea = mitral annulus early diastolic velocity; GSRa = global strain rate during late left ventricular filling; GSRe = global strain rate during early left ventricular filling; GSRivr = global strain rate during the isovolumic relaxation phase of the cardiac cycle period; MVO = mitral valve opening. Reprinted, with permission, from Wang et al. (32).