PROBLEM TO BE SOLVED: To provide a multiple electrode type intracardiac defibrillation catheter and a multiple electrode type intracardiac defibrillation catheter unit capable of easily supplying an electric current required for defibrillation to a site where abnormal electric stimulation detected at an EP detection electrode is generated, from a defibrillation electrode, and reliably performing defibrillation.SOLUTION: A multiple electrode type intracardiac defibrillation catheter includes: first electrode groups 320G and 321G having two or more first electrodes 320 and 321 for detecting an electrophysiological electric signal at an intracardiac site or a cell group and second electrode groups 330G and 331G having one or more second electrodes 330 and 331 located between the two neighboring first electrodes for feeding an electric current by high-voltage defibrillation electric shock for defibrillation to an intracardiac contact site or an intracardiac and intravenous contact site. A conductive length of a surface in a longitudinal direction of a catheter shaft of the second electrode is equal to or larger than a conductive length in the first electrode.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2019,JPO&INPIT【課題】EP検査用電極で発見した異常な電気刺激を発生している部位に、除細動のために要求される電流を除細動用電極から容易に供給でき、確実に除細動を行うことが可能な複合電極型心腔内除細動カテーテル及び複合電極型心腔内除細動カテーテルユニットを提供する。【解決手段】複合電極型心腔内除細動カテーテルは、心腔内の部位又は細胞群の電気生理学上の電気信号を検出する2以上の第1電極320、321を具備してなる第1電極群320G、321Gと、隣り合う2つの前記第1電極の間に位置する、心腔内又は心腔内と静脈内での接触部位に除細動のための高電圧の除細動電気衝撃による電流を流すための1以上の第2電極330、331を具備してなる第2電極群330G、331Gを含み、前記第2電極の前記カテーテルシャフトの長手方向における表面の導電長が前記第1電極における当該導電長以上の長さを有することを特徴としている。【選択図】図5
