#tiktokretrocontest Echocardiography reveals patent ductus arteriosus (PDA) as a direct connection between the aorta and pulmonary artery, visualized by color Doppler as a turbulent jet of blood flow, typically from the aorta into the pulmonary artery. Other findings include increased flow velocity in the pulmonary artery, signs of increased left heart size (enlargement), and potentially left ventricular hypertrophy. The degree of flow and pressure changes through the PDA helps determine its hem