Nano multipole rings for medical microleads

A multipolar lead for detection/stimulation for implantation in a venous, arterial or lymphatic network, comprising:

• at least two microcables, each comprising a full central conductor for connection to a generator of an active implantable medical device, and each having an insulating polymeric material surrounding the central conductor on its periphery and along its length;
• and
• at least one detection/stimulation electrode for electrically connecting to a central conductor of a microcable and to come against a wall of a target vessel of said venous, arterial or lymphatic network, wherein the at least one electrode comprises a cylindrical metal ring having a longitudinal connection lumen to receive a microcable and to form an electrical connection between at least one portion of the ring and the microcable, and at least one longitudinal lumen for passing the other microcable without forming an electrical connection;
• wherein the at least one electrode further comprises a conductive member for forming the electrical connection by perforation;
• and
• wherein the ring comprises at least one guiding tunnel transverse to the ring, formed between the periphery of the ring and the lumen for electrical connection, wherein the conductive member slides in the guiding tunnel.