Interventional devices for chronic total occlusion recanalization under MRI guidance

A guide catheter having a distal and proximal end, the guide catheter comprising:

• a flexible tubing;
• a first microcoaxial cable disposed within the flexible tubing;
• a second microcoaxial cable disposed within the flexible tubing;
• a loop antenna disposed at the distal end of the guide catheter, wherein the loop antenna is connected to the first microcoaxial cable;
• and
• a loopless antenna disposed between the loops antenna and the proximal end of the guide catheter, wherein the loopless antenna is connected to the second microcoaxial cable.

A guidewire for use in conjunction with a catheter, the guidewire comprising:

• a guidewire microcoaxial cable having a shield;
• a first loop antenna disposed at a distal end of the guidewire;
• and
• a second loop antenna,
• wherein the first loop antenna and the second loop antenna are connected to the shield.

A guide catheter for chronic total occlusion recanalization, the guide catheter having a distal end and a proximal end, the guide catheter comprising:

• a flexible tubing;
• an outer conductive braid within the flexible tubing, the outer conductive braid being substantially concentric to the flexible tubing;
• an inner conductive braid, substantially concentric to the outer conductive braid, the inner conductive braid extending beyond a termination of the outer conductive braid and toward the distal end;
• an insulator between the outer conductive braid and the inner conductive braid;
• a microcoaxial cable disposed within the flexible tubing, the microcoaxial cable having an inner conductor and a shield;
• and
• a loop antenna disposed at the distal end of the guide catheter, wherein the loop antenna is connected to the microcoaxial cable.