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Pulsed wave Doppler interrogation in a patient with a patent ductus arteriosus and significant left-to-right shunting with retrograde diastolic flow

Pulsed wave Doppler interrogation in a patient with a patent ductus arteriosus and significant left-to-right shunting with retrograde diastolic flow
In a patient with a patent ductus arteriosus (PDA) and significant left-to-right shunting, pulsed Doppler echocardiography shows retrograde diastolic flow in the descending aorta (arrows) towards the PDA.
L: left; R: right.
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