Abstract: One aspect refers to a lead for a medical device, including a cable comprising an outer insulation having at least one first opening near a distal end of the cable and an inner lumen. The inner lumen is arranged coaxially to the outer insulation. At least one conducting channel is arranged between the outer insulation and the inner lumen. The at least one conducting channel is formed by at least one insulated conductor. The insulation layer comprises a second opening, which is aligned with the at least one first opening. At least one ring electrode surrounds the cable at a position of the at least one aligned first and second opening of the cable. The at least one ring electrode is selectively connected to the conductor of the at least one insulated conductor via a bendable bridging element extending through the at least one aligned first and second opening.

Abstract: A catheter that is configured to achieve high velocity injections of contrast solution that will not readily wash out in retrograde blood flow. The distal end of the catheter can include a plurality of fluid outlet openings. The fluid outlet openings are spaced circumferentially around the circumference of the catheter and the fluid outlet openings have ejection axes that are angled in a direction toward the distal end so that a velocity component of the ejected contrast solution is against or opposite the retrograde blood flow.