Echocardiogram image with color flow mapping of a moderate patent ductus arteriosus in a neonate

Echocardiogram still frame and movie clip demonstrate a moderately large patent ductus arteriosus (PDA) in a neonate with pulmonary hypertension. There is bidirectional shunting within the PDA (arrow in still frame) coursing between the descending aorta (DAo), seen in cross section, and the main pulmonary artery (MPA). Flow is left to right in diastole, and right to left in systole.