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    PULSED ELECTRIC FIELD ABLATION FOR IMPLANTABLE MEDICAL DEVICES
    4.
    发明公开
    PULSED ELECTRIC FIELD ABLATION FOR IMPLANTABLE MEDICAL DEVICES 审中-公开

    公开(公告)号：US20230310871A1

    公开(公告)日：2023-10-05

    申请号：US18194911

    申请日：2023-04-03

    申请人： Medtronic, Inc.

    发明人： Brian T. Howard ,  Timothy G. Laske ,  Alexander J. Hill ,  Anthony W. Rorvick ,  Robert C. Kowal

    IPC分类号： A61N1/39 ,  A61N1/362

    CPC分类号： A61N1/39 ,  A61N1/362

    摘要： Implantable medical device including a pulsed-voltage generator and one or more implantable electrical leads. In one example, the implantable medical device supports the defibrillator and ablation modalities characterized by different respective sets of waveform parameters, such as the pulse amplitude and width. In some examples, the implantable medical device also supports a pacing modality. The electrodes used for the different modalities are variously selected from a plurality of electrodes located in distal portions of the implantable electrical leads and on the exterior surface of the implantable device box. An electronic controller of the implantable medical device is wirelessly programmable to appropriately control, e.g., in a patient-specific manner, operations of the pulsed-voltage generator and transitions between different modalities. Various examples of the disclosed implantable medical device can beneficially be used to provide to a cardiac patient a greater variety of treatment options without having to replace the implantable medical device.

    INTRACARDIAC DEFIBRILLATION CATHETER SYSTEM
    6.
    发明公开
    INTRACARDIAC DEFIBRILLATION CATHETER SYSTEM 审中-公开

    公开(公告)号：US20230211154A1

    公开(公告)日：2023-07-06

    申请号：US17359283

    申请日：2021-06-25

    申请人： Japan Lifeline Co., Ltd.

    发明人： Yasuhiro Kojima

    IPC分类号： A61N1/05 ,  A61N1/39

    CPC分类号： A61N1/0563 ,  A61N1/39 ,  A61B5/25

    摘要： An intracardiac defibrillation catheter system includes a defibrillation catheter, a power supply device, and an electrocardiograph, in which an arithmetic processing unit of the power supply device sequentially senses an event estimated to be an R wave from an electrocardiogram input from the electrocardiograph, calculates a heart rate each time sensing is performed, and, when, after an event (Vn) is sensed and after an application execution switch is input, an event (Vn+m) is sensed, performs arithmetic processing so that a DC voltage is applied in synchronization with the event (Vn+m) only in a case where the event (Vn+m) is sensed after a lapse of a refractory period whose length corresponds to 50% of a reciprocal of a heart rate (An) at a sensing time point of the event (Vn), to control a DC power supply unit. The defibrillation catheter system can reliably avoid performing defibrillation in synchronization with a T wave without being affected by the level of the heart rate of a patient.