Catheter for measuring electric potential
A highly safe catheter that measures electric potential can be inserted into a cardiac chamber together with a balloon-tip ablation catheter and is able to prevent abnormal heat generation at electric potential-measuring electrodes even when high-frequency current is distributed. The catheter includes a shaft having electric potential-measuring electrodes, a metal portion with a length of 2 mm or more, and a lumen passing therethrough from a proximal end to a distal end in the longitudinal direction; and a metal wire inserted through the lumen and connected to the metal portion.
1. A catheter that measures electric potential comprising:
a shaft having electric potential-measuring electrodes, a metal portion with a length of 2 mm or more, and a lumen passing therethrough from a proximal end to a distal end in a longitudinal direction; and
a metal wire inserted through said lumen and connected to said metal portion, wherein a proximal end of the metal wire does not have any electrical connection.
2. The catheter according to claim 1 ,
wherein said electric potential-measuring electrodes are attached at a distal side in the longitudinal direction of said shaft, and
said metal portion is located distally relative to a position of said electric potential-measuring electrodes in the longitudinal direction of said shaft.
3. The catheter according to claim 2 , wherein said metal portion has a length of 2 to 50 mm.
4. The catheter according to claim 1 , wherein said metal portion has a length of 2 to 50 mm.
5. The catheter according to claim 1 , wherein said metal wire is electrically insulated.
6. A balloon-tip ablation catheter system comprising:
the catheter according to claim 1 ; and
a balloon-tip ablation catheter comprising a lumen passing therethrough from a proximal end to a distal end in the longitudinal direction,
wherein said catheter for measuring electric potential is inserted through the lumen of said balloon-tip ablation catheter.