balloon catheters , and medical devices including balloon catheters , are provided that comprise a balloon assembly disposed at the distal end of an elongated tubular member . the balloon , when in the inflated state , includes a body fluid lumen that extends longitudinally through the balloon and is open at the proximal end of the balloon and the distal end of the balloon . in some aspects , the outer surface of the balloon is contiguous from the proximal end to the distal end of the balloon when the balloon is inflated . in other aspects , an endoluminal prosthesis , for example , a stent that can optionally include a prosthetic valve , surrounds the balloon assembly and is adjacent to the outer surface of the balloon . in still other aspects , endoluminal prosthesis implant devices are provided that are suitable for implanting an endoluminal prosthesis in a body vessel containing a flowing fluid such as a vessel in the heart , e . g ., the left or right ventricle inflow or outflow tracks . the endoluminal prosthesis implant devices include a balloon assembly and an endoluminal prosthesis surrounding the balloon assembly . the balloon assembly is configured to permit a fluid to pass from the first end of the balloon to the second end of the balloon when the balloon is in an inflated state . in some embodiments of all of these aspects , the balloon is configured to prevent a fluid from passing from the second end of the balloon to the first end of the balloon when the balloon is in an inflated state . in some embodiments , for example , the body fluid lumen includes a body fluid lumen valve moveable between a first position and a second position . the body fluid lumen valve occludes the body fluid lumen to a greater extent in the first position than in the second position . in some embodiments , the body fluid lumen valve substantially prevents a fluid from flowing through the body fluid lumen in a first direction . certain aspects and / or embodiments of the balloon catheters , and medical devices including balloon catheters , may allow for the deployment of an endoluminal prosthetic valve , while the native valve can continue to function uninterrupted under its native load and flow .