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    • 7. 发明申请
    • Cardiac rhythm management system with defibrillation threshold prediction
    • 心脏节律管理系统除颤阈值预测
    • US20050251215A1
    • 2005-11-10
    • US11061315
    • 2005-02-18
    • Richard DujmovicPhil FosheeRichard FogorosJoseph SmithDouglas DaumWeimin Sun
    • Richard DujmovicPhil FosheeRichard FogorosJoseph SmithDouglas DaumWeimin Sun
    • A61N1/39
    • A61N1/3937A61N1/3943
    • A cardiac rhythm management device predicts defibrillation thresholds without any need to apply defibrillation shocks or subjecting the patient to fibrillation. Intravascular defibrillation electrodes are implanted in a heart. By applying a small test energy, an electric field near one of the defibrillation electrodes is determined by measuring a voltage at a sensing electrode offset from the defibrillation electrode by a known distance. A desired minimum value of electric field at the heart periphery is established. A distance between a defibrillation electrodes and the heart periphery is measured, either fluoroscopically or by measuring a voltage at an electrode at or near the heart periphery. Using the measured electric field and the measured distance to the periphery of the heart, the defibrillation energy needed to obtain the desired electric field at the heart periphery is estimated. In an example, the device also includes a defibrillation shock circuit and a stimulation circuit.
    • 心律管理装置预测除颤阈值,而不需要施加除颤电击或使患者起颤。 血管内除颤电极植入心脏。 通过施加小的测试能量,通过测量从除颤电极偏移已知距离的感测电极处的电压来确定除颤电极之一附近的电场。 建立心脏周围电场的期望最小值。 测量除颤电极和心脏周边之间的距离,通过荧光透视或通过测量心脏周围处或附近的电极处的电压。 使用测量的电场和到心脏外围的测量距离,估计在心脏周边获得所需电场所需的除颤能量。 在一个示例中,该装置还包括除颤电击电路和刺激电路。