PROBLEM TO BE SOLVED: To provide an electrode catheter which hardly causes deformation of a catheter tip portion when the electrode catheter is pushed into a blood vessel with the catheter tip portion first, can be pushed into the blood vessel smoothly, and allows the catheter tip portion pushed from the tip portion opening of a sheath to be excellently restored in shape.SOLUTION: The electrode catheter comprises a catheter body 10, a control handle 20, the catheter tip portion 30, and a plurality of ringlike electrodes 41 wherein the catheter tip portion 30 has a linear proximal end a side region 31 extending in the distal direction to reach the distal end 30D, a spiral body region 32 extending from the distal end 30D in the proximal direction while forming loops (321, 322) around the proximal end side region 31, and a distal end side region 34 extending from the tip portion of the body region 32 in the distal direction.COPYRIGHT: (C)2009,JPO&INPIT【課題】カテーテル先端部を先頭にして血管内に押し込む際に、当該カテーテル先端部が変形しにくく、血管内にスムーズに押し込むことができ、シースの先端開口から押し出されたカテーテル先端部の形状復元性にも優れた電極カテーテルを提供すること。【解決手段】カテーテル本体10と、制御ハンドル20と、カテーテル先端部30と、複数のリング状電極41とを備えてなる電極カテーテルであって、カテーテル先端部30は、遠位方向に延びて遠位端30Dに至る直線状の基端側領域31と、遠位端30Dから基端側領域31の周りにループ(321・322)を形成しながら近位方向に延びる螺旋状の本体領域32と、本体領域32の先端から遠位方向に延びる先端側領域34とを有する。【選択図】 図2
