fig2
From: Transcatheter closure of patent ductus arteriosus: review of author's experiences and observations
Figure 2. Echocardiographic study demonstrating various features of a medium-sized patent ductus arteriosus (PDA). (A) shows shunting from the descending aorta (DAo) into the pulmonary artery across the ductus. (B) shows Doppler features of the PDA. Note high Doppler velocity of approximately 4 m/s by continuous wave Doppler, suggesting that the pressure in the pulmonary artery is low. Ao: Aorta; D: diastolic; RV: right ventricle; S: systolic. Reproduced from Ref.[11].
