I'm so sorry. I didn't even know what it was until I looked it up. I found the following and hope it will help a bit. Only you can make this decision on whether you keep the pup and whether or not you can afford the costs involved. I wish you good luck. I'm sure you'll know in your gut what you want to do and what is right for you, too.
Patent Ductus Arteriosus in Dogs Top Patent Ductus Arteriosus PDA Heart Problems Yorkie Yorkshire Terriers Goldenray