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Figure 4 Tissue Doppler trace and tissue tracking in the free wall of the right ventricular (RV) in a 24-year-old man after a Mustard operation. There is a wall motion abnormality: tissue tracking demonstrates that during systole only the base and part of the midwall of the RV are displaced from base to apex (i.e., shorten) during systole, while the rest of the RV wall shortens in diastole. Likewise, the myocardial velocities in systole and diastole at the base (yellow) and apex (green) are reversed.