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Figure 2 Normal myocardial velocity profile of the right ventricular (RV) free wall in a 17-year-old boy with transposition of the great arteries after a Senning operation. The systolic and diastolic velocities do not change direction when sampled from base to apex along the RV free wall. The tissue tracking software that integrates velocities directed from base to apex shows that there is myocardial displacement from base to apex during systole in all parts of the RV free wall.