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Figure 1 Examples of Measures on Myocardial Velocity Curve
Measurement of peak myocardial systolic (Sm), early diastolic (Em), and late diastolic (Am) velocities, as well as the time to peak systolic velocity in ejection phase (Ts) at basal septal and basal lateral segments by 2-dimensional color-coded tissue Doppler imaging in a normal subject (A) and in a patient with systolic heart failure and wide QRS complex (B). Myocardial velocity curves are reconstituted offline from the color tissue Doppler images. Note that in heart failure there is a reduction of Sm and Em. Systolic dyssynchrony is demonstrated by the delay of Ts in the basal lateral segment when compared with the basal septal segment. AVO and AVC = aortic valve opening and closure, respectively; MVO and MVC = mitral valve opening and closure, respectively.
