Catheters and systems for endovascular treatment of a blood vessel

A system for forming a fistula between two blood vessels, comprising:

• a first catheter comprising:
• a first catheter body;
• a magnetic element positioned along the first catheter body, the magnetic element comprising a distal end and a proximal end;
• a first electrode wire configured to project from a working site positioned along the catheter body, the first electrode wire comprising a first electrode wire proximal end;
• and
• a second electrode wire comprising a second electrode distal end, wherein:
• the first electrode wire proximal end is coupled to the distal end of the magnetic element;
• the second electrode wire distal end is coupled to the proximal end of magnetic element;
• and
• the magnetic element is configured to conduct electricity from the first electrode wire to the second electrode wire;
• and
• a second catheter configured to coapt with the first catheter and receive the second electrode wire.

A method of forming a fistula between a first blood vessel and a second blood vessel, comprising:

• advancing a first catheter into the first blood vessel, wherein the first catheter comprises:
• a first catheter body;
• a magnetic element positioned along the first catheter body, the magnetic element comprising a distal end and a proximal end;
• a first electrode wire configured to project from a working site positioned along the catheter body, the first electrode wire comprising a first electrode wire proximal end;
• and
• a second electrode wire comprising a second electrode distal end, wherein:
• the first electrode wire proximal end is coupled to the distal end of the magnetic element;
• the second electrode wire distal end is coupled to the proximal end of magnetic element;
• the magnetic element is configured to conduct electricity from the first electrode wire to the second electrode wire;
• and
• the magnetic element is configured to conduct electricity from the first portion of the electrode wire to the second portion of the electrode wire;
• advancing a second catheter into the second blood vessel adjacent to the first blood vessel, wherein the second catheter comprises:
• a second catheter body;
• and
• a second working site;
• and
• forming the fistula between the first blood vessel and the second blood vessel at the working site and the second working site.