The implantable medical device includes at least one frame having a rounded shape and formed of a plurality of rounded legs. In one embodiment, the device includes two frames having similar rounded shapes and coupled to one another by means of a flexible coupling. The flexible coupling enables the frames to tilt relative to one another and relative to a vessel in which the device is deployed. The rounded nature of the frames enables the frames to tilt in the vessel while retaining proper contact to the vessel wall and the functional characteristics of the frames. The device may have just one frame in some embodiments and three or more frames in other embodiments. The device may be a filter, an occluding device or any other suitable medical device.
