皮下植入式心脏除颤系统

本发明涉及植入式皮下心脏除颤系统，包括：壳体；以及包括两个端部的皮下植入式引脚，近端连接到所述壳体而远端是自由端；所述皮下植入式引脚包括至少一个除颤电极和至少三个检测电极；第一检测电极和第二检测电极形成第一偶极子；第三检测电极和所述第一检测电极、或者所述第三检测电极和所述第二检测电极、或者所述壳体和其中一个所述检测电极形成第二偶极子；所述除颤电极被定位在所述第二检测电极和所述第三检测电极之间；所述第一偶极子定位在所述壳体与所述除颤电极之间；所述第三电极定位在所述引脚的自由远端与所述除颤电极之间；以及所述第一偶极子的长度短于所述第二偶极子的长度。 A cardiac defibrillation system. The system comprising a housing and an implantable lead. The implantable lead comprising two ends, including a first end connected to the housing and a second end being a free end. The implantable lead also comprising a defibrillation electrode and at least three detection electrodes including a first detection electrode, a second detection electrode, and a third detection electrode. The first detection electrode and the second detection electrode forming a first dipole. The third detection electrode and the first detection electrode, or, the third detection electrode and the second detection electrode, or, the housing and one of said detection electrodes, forming a second dipole, where a length of the fir