Aortic angiogram to show the size, shape and position of a Patent Ductus Arteriosus (PDA) in a 3 month old female German Shepherd Dog (GSD). Accurate measurement of the duct, by both ultrasound and angriogrpahy is important in selecting the correct size of ACDO for closure. 
See http://www.youtube.com/watch?v=F1BDn6... for the deployment of an ACDO in this dog.