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    After potential removal in cardiac rhythm management device
    1.
    发明授权
    After potential removal in cardiac rhythm management device 失效
    心脏节律管理装置中潜在去除后

    公开(公告)号：US5690683A

    公开(公告)日：1997-11-25

    申请号：US492199

    申请日：1995-06-19

    申请人： Paul A. Haefner ,  Mark A. Stockburger ,  William J. Linder

    发明人： Paul A. Haefner ,  Mark A. Stockburger ,  William J. Linder

    IPC分类号： A61N1/37 ,  A61N1/39

    CPC分类号： A61N1/3704 ,  Y10S128/901

    摘要： An apparatus effectively removes after potential occurring after a electrical pulse is delivered in a cardiac rhythm management system such as a pacemaker system or cardioverter/defibrillator system having an electrode used for both sensing electrical activity of the heart and carrying the electrical pulse to the heart and a sense amplifier for detecting the electrical activity from the electrode. The apparatus includes a lowpass filter coupled to the electrode to filter the sensed electrical activity. A highpass filter is coupled between the lowpass filter and the sense amplifier to further filter the electrical activity passed from the lowpass filter. Equilibrium circuitry is included to allow passive filter components of the lowpass filter and the highpass filter to return to an equilibrium state following delivery of the electrical pulse.

    摘要翻译： 一种装置在电脉冲在诸如起搏器系统或心脏转复器/除颤器系统的心律管理系统中传递之后有效地消除，所述心脏起搏器系统或心脏转复器/除颤器系统具有用于感测心脏的电活动并将心电的脉搏传送到心脏的电极， 用于检测来自电极的电活动的读出放大器。 该装置包括耦合到电极的低通滤波器以滤波感测的电活动。 低通滤波器耦合在低通滤波器和读出放大器之间，以进一步滤除从低通滤波器传递的电活动。 包括平衡电路，以允许低通滤波器的无源滤波器组件和高通滤波器在电脉冲传递后恢复平衡状态。

    Digital AGC using separate gain control and threshold templating
    2.
    发明授权
    Digital AGC using separate gain control and threshold templating 失效
    数字AGC使用单独的增益控制和阈值模板

    公开(公告)号：US5620466A

    公开(公告)日：1997-04-15

    申请号：US514612

    申请日：1995-08-14

    申请人： Paul A. Haefner ,  Mark A. Stockburger ,  William J. Linder

    发明人： Paul A. Haefner ,  Mark A. Stockburger ,  William J. Linder

    IPC分类号： A61N1/37 ,  A61N1/08 ,  A61B5/04

    CPC分类号： A61N1/3704

    摘要： A system and method automatically adjusts a sensing threshold in a cardioverter/defibrillator which receives electrical activity of the heart and delivers shock pulses in response thereto. An amplifier amplifies the electrical activity according to a variable gain. A detection circuit detects depolarizations in the amplified electrical activity and provides a detect signal representing a cardiac event indicative of a depolarization when the amplified electrical activity exceeds a variable sensing threshold. Slow gain control circuitry adjusts the variable gain in discrete steps based on stored peak history information representing peak values of the amplified electrical activity. Template generation circuitry responds quickly to set the variable sensing threshold to a level proportional to a peak value of the amplitude of the amplified electrical activity and then decreases the variable sensing threshold from the level in discrete steps until the variable sensing threshold is at a low threshold value.

    摘要翻译： 系统和方法在接收心脏的电活动并响应于其的脉冲脉冲输出的心律转换器/除颤器中自动调节感测阈值。 放大器根据可变增益放大电气活动。 检测电路检测放大的电活动中的去极化，并且当放大的电活动超过可变​​感测阈值时提供表示指示去极化的心脏事件的检测信号。 缓慢增益控制电路根据代表放大的电活动峰值的存储的峰值历史信息来调整离散步长中的可变增益。 模板生成电路快速响应，将可变感测阈值设置成与放大的电活动的幅度的峰值成比例的电平，然后从离散步骤中的电平减小可变感测阈值，直到变量感测阈值处于低阈值 值。

    Slow gain control
    3.
    发明授权
    Slow gain control 失效
    慢增益控制

    公开(公告)号：US5662688A

    公开(公告)日：1997-09-02

    申请号：US514931

    申请日：1995-08-14

    申请人： Paul A. Haefner ,  Mark A. Stockburger

    发明人： Paul A. Haefner ,  Mark A. Stockburger

    IPC分类号： A61N1/37 ,  A61N1/39

    CPC分类号： A61N1/3704 ,  Y10S128/901

    摘要： A system and method automatically controls a gain of a cardioverter/defibrillator which receives electrical activity of the heart and delivers shock pulses in response thereto. An amplifier amplifies the electrical activity according to a variable gain. A detection circuit detects depolarizations in the amplified electrical activity and provides a detect signal representing a cardiac event indicative of a depolarization when the amplified electrical activity exceeds a sensitivity threshold. A storage device stores peak history information representative of peak values of the amplified electrical activity of a first selected number (N) of cardiac events. Slow gain control circuitry adjusts the variable gain in discrete steps based on the stored peak history information.

    摘要翻译： 系统和方法自动控制接收心脏电活动并响应于其的冲击脉冲的心律转复除颤器的增益。 放大器根据可变增益放大电气活动。 检测电路检测放大的电活动中的去极化，并且当放大的电活动超过灵敏度阈值时提供表示指示去极化的心脏事件的检测信号。 存储装置存储表示心脏事件的第一选定数量（N）的放大的电活动的峰值的峰值历史信息。 慢增益控制电路根据存储的峰值历史信息，以离散步长调整可变增益。

    Threshold templating for digital AGC
    4.
    发明授权
    Threshold templating for digital AGC 失效
    数字AGC阈值模板

    公开(公告)号：US5658317A

    公开(公告)日：1997-08-19

    申请号：US514929

    申请日：1995-08-14

    申请人： Paul A. Haefner ,  Mark A. Stockburger

    发明人： Paul A. Haefner ,  Mark A. Stockburger

    IPC分类号： A61N1/37 ,  A61N1/39

    CPC分类号： A61N1/3704 ,  Y10S128/901

    摘要： A system and method automatically adjusts a sensing threshold in a cardioverter/defibrillator which receives electrical activity of the heart and delivers shock pulses in response thereto. An amplifier amplifies the electrical activity. A detection circuit detects depolarizations in the amplified electrical activity and provides a detect signal representing a cardiac event indicative of a depolarization when the amplified electrical activity exceeds a variable sensing threshold. Digital template generation circuitry responds quickly to track amplitudes of the electrical activity and to set the variable sensing threshold to a level proportional to a peak value of the amplitude of the amplified electrical activity and then decreases the variable sensing threshold from the level in discrete steps until the variable sensing threshold is at a low threshold value. The discrete steps are grouped into step groups. Each step group decreases the variable sensing threshold by a defined percentage.

    摘要翻译： 系统和方法在接收心脏的电活动并响应于其的脉冲脉冲输出的心律转换器/除颤器中自动调节感测阈值。 放大器放大电气活动。 检测电路检测放大的电活动中的去极化，并且当放大的电活动超过可变​​感测阈值时提供表示指示去极化的心脏事件的检测信号。 数字模板产生电路快速响应以跟踪电活动的振幅，并将可变感测阈值设置为与放大的电活动的幅度的峰值成比例的电平，然后从离散步骤中的级别减小可变感测阈值，直到 可变感测阈值处于低阈值。 离散步骤分组成步骤组。 每个步骤组将可变检测阈值降低一个定义的百分比。