Aorto-Pulmonary Window

In this view, one may see the pulmonary valve with a connection from the main pulmonary artery to the aorta - a large aorto pulmonary window. 

Here, the opening of the AP window at the pulmonary artery end is outlined with the circle in red. 

Colour outlining the bidirectional flow via the AP window. 

The AP window is outlined by the red arrow.

Sweep where we can appreciate the AP window, the RPA and the LPA from the main pulmonary artery branching. 

Parasternal short axis outlining the connection between the aorta and the main pulmonary artery. Diameter of 0.58 cm. 

Branching of the pulmonary arteries and connection of the AP window from the pulmonary to the aortic end in the high parasternal short axis. 

Retrograde flow in the descending aorta. 

Holodiastolic retrograde flow in the descending aorta from a steal effect likely through the aorto-pulmonary window. 

In this case there is also a tiny PDA seen here branching from the MPA after the LPA. The PDA is connecting to the right subclavian artery. 

Small PDA that is feeding the aberrant right subclavian artery. 

AP windown from the apical view using colour flow (outlined by the red arrow).