Unexpected co-arctation of aorta detected by transesophageal echocardiography during patent ductus arteriosus ligation |
|
Fei Liu
 , Ke Dian |
| Fig.4 Diagram of the proposed mechanisms of PDA masking the symptoms of CoA. A PDA functions as a conduit bypassing the site of potential obstruction for patients with left-to-right shunt. B PDA functions as a channel through which blood flows from the pulmonary artery to supply the descending aorta. C After closure of the PDA, the presence of juxtaductal co-arctation becomes manifested by a pressure difference between ascending and descending aortas. |
 |