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These data indicate that following the institution of PGE and initial medical and ventilatory management, there is an increase in RV annular and septal systolic velocities from the initial to the preoperative period and that these indices as well as RV annular diastolic velocities decline significantly postoperatively. Initial septal diastolic velocities were severely abnormal and did not significantly change pre- and postoperatively. These data may have significance for both postoperative and subsequent long-term RV function.

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