Abstract: A catheter includes an elongated body including a distal body portion and defining a body inner lumen. The catheter includes an expandable member coupled to and extending from the distal body portion. The expandable member includes an expandable support member and a polymer jacket. The expandable member defines an expandable member inner lumen. The expandable member inner lumen is in fluid communication with the body inner lumen. The expandable support member includes a tubular body and is configured to self-expand to expand the expandable member inner lumen radially outward. The polymer jacket at least partially overlays the expandable support member. The polymer jacket includes polymer loaded with a radiographic material, and the radiographic material configured to be visible via medical imaging.

Abstract: In some examples, an endovascular system includes an elongated body configured to be introduced into a blood vessel of a patient, a plurality of electrodes carried by the elongated body, and an elongated scaffold configured to be introduced into the blood vessel and configured to transform between a relatively low-profile delivery configuration and a deployed configuration. In the deployed configuration, the elongated scaffold is configured to exert a radial force to urge the elongated body and the plurality of electrodes towards a wall of the blood vessel. After being introduced into the blood vessel of the patient, the elongated scaffold is configured to resorb or degrade over a period of time. A degradation profile of the elongated scaffold over the period of time corresponds to a level of endothelization proximate the plurality of electrodes.