In fetal circulation, the ductus arteriosus serves as a critical bridge between the pulmonary artery and the aorta, ensuring proper oxygenation before birth. But what happens when this temporary pathway remains open after birth? A patent ductus arteriosus (PDA) can range from a benign finding to a significant lesion causing volume overload and pulmonary hypertension. Sonographers play a key role in evaluating PDA severity, identifying its hallmark Doppler findings, and guiding clinical decision-making. Mastering its echocardiographic assessment is essential—but what are the best techniques to visualize and quantify it? Let’s explore the details.
