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    Method and apparatus for detecting arrhythmias in a medical device
    2.
    发明授权
    Method and apparatus for detecting arrhythmias in a medical device 有权
    用于检测医疗装置中的心律失常的方法和装置

    公开(公告)号：US07761150B2

    公开(公告)日：2010-07-20

    申请号：US11380846

    申请日：2006-04-28

    申请人： Raja N. Ghanem ,  Robert W. Stadler ,  Xusheng Zhang

    发明人： Raja N. Ghanem ,  Robert W. Stadler ,  Xusheng Zhang

    IPC分类号： A61N1/368

    CPC分类号： A61N1/3987 ,  A61B5/04011 ,  A61B5/0422 ,  A61B5/0456 ,  A61B5/046 ,  A61B5/0464 ,  A61B5/0468 ,  A61B5/4836 ,  A61B5/686 ,  A61B5/7203 ,  A61B5/7221 ,  A61B5/7239 ,  A61N1/05 ,  A61N1/3621 ,  A61N1/3925 ,  A61N1/3956 ,  Y10S128/901 ,  Y10S128/902

    摘要： A method of detecting a cardiac event in a medical device that includes determining a first characteristic in response to cardiac signals sensed along a first sensing vector over a predetermined sensing window and in response to cardiac signals sensed along a second sensing vector over the predetermined sensing window, determining a second characteristic in response to cardiac signals sensed along the first sensing vector over the predetermined sensing window and in response to cardiac signals sensed along the second sensing vector over the predetermined sensing window, and determining a third characteristic in response to cardiac signals sensed along the first sensing vector over the predetermined sensing window and in response to cardiac signals sensed along the second sensing vector over the predetermined sensing window.

    摘要翻译： 一种检测医疗设备中的心脏事件的方法，包括响应于沿着预定感测窗口沿着第一感测向量感测的心脏信号并且响应于沿着预定感测窗口沿着第二感测向量感测的心脏信号来确定第一特性 ，响应于沿着预定感测窗口沿着第一感测向量感测的心脏信号并且响应于沿着预定感测窗口沿着第二感测向量感测到的心脏信号，确定响应于感测到的心脏信号的第三特性的第二特性 沿着预定感测窗口上的第一感测向量，并且响应于沿着预定感测窗口沿着第二感测向量感测的心脏信号。

    Periodic beat detection to detect artifacts in a cardiac electrogram
    6.
    发明授权
    Periodic beat detection to detect artifacts in a cardiac electrogram 有权
    定期拍摄检测心脏电图中的伪影

    公开(公告)号：US08050751B2

    公开(公告)日：2011-11-01

    申请号：US12183950

    申请日：2008-07-31

    申请人： Xusheng Zhang ,  Raja N. Ghanem ,  Robert W. Stadler

    发明人： Xusheng Zhang ,  Raja N. Ghanem ,  Robert W. Stadler

    IPC分类号： A61B5/0464

    CPC分类号： A61N1/3621 ,  A61B5/0464 ,  A61B5/7221 ,  A61B5/7239 ,  A61N1/36507 ,  A61N1/3925 ,  A61N1/3962

    摘要： Techniques for determining whether artifacts are present in a cardiac electrogram are described. According to one example, a medical device senses a cardiac electrogram via electrodes. The medical device determines a derivative, e.g., a second order derivative, the electrogram. The medical device detects beats within the derivative, e.g., by comparing a rectified version of the derivative to one or more thresholds determined based on a maximum of the rectified derivative. The medical device determines whether the beats are periodic, and determines whether artifacts are present in the cardiac electrogram based on the determination of whether the beats are periodic. The medical device may further determine whether tachyarrhythmia is present and/or whether the cardiac rhythm of the patient is treatable based on the determination of whether the beats are periodic. For example, the medical device may determine that an electrogram is not treatable when the beats are periodic.

    摘要翻译： 描述了用于确定伪像是否存在于心电图中的技术。 根据一个示例，医疗装置通过电极感测心电图。 医疗设备确定导数，例如二阶导数，电描记图。 医疗设备检测导数内的跳动，例如通过将导数的整流版本与基于校正导数的最大值确定的一个或多个阈值进行比较。 医疗器械确定节拍是否是周期性的，并且基于确定节拍是否是周期性的确定来确定心脏电图中是否存在假象。 医疗装置可以基于是否是周期性的确定来进一步确定是否存在快速性心律失常和/或患者的心律是否可治疗。 例如，当节拍是周期性的时，医疗装置可以确定电描记图是不可治疗的。

    Method and apparatus for detecting arrhythmias in a subcutaneous medical device
    7.
    发明授权
    Method and apparatus for detecting arrhythmias in a subcutaneous medical device 有权
    用于检测皮下医疗装置中的心律失常的方法和装置

    公开(公告)号：US07991471B2

    公开(公告)日：2011-08-02

    申请号：US11461269

    申请日：2006-07-31

    申请人： Raja N. Ghanem ,  Robert W. Stadler ,  Xusheng Zhang

    发明人： Raja N. Ghanem ,  Robert W. Stadler ,  Xusheng Zhang

    IPC分类号： A61N1/368

    CPC分类号： A61N1/3956 ,  A61B5/046 ,  A61B5/0464 ,  A61B5/7239 ,  A61N1/3621

    摘要： A method and apparatus for detecting a cardiac event in a medical device that includes sensing cardiac signals from a plurality of electrodes forming a first sensing vector and a second sensing vector, advancing from a first state to a second state in response to processing of an interval associated with a cardiac cycle of the sensed cardiac signals, and advancing from the second state in response to processing of a cardiac signal sensed during a predetermined sensing window.

    摘要翻译： 一种用于检测医疗设备中的心脏事件的方法和装置，包括：感测来自形成第一感测向量的多个电极的心脏信号和响应于间隔的处理从第一状态进入第二状态的第二感测向量 与感测的心脏信号的心动周期相关联，并且响应于在预定感测窗口期间感测的心脏信号的处理而从第二状态前进。

    METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE
    9.
    发明申请
    METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE 有权
    用于检测医疗器械中的ARRHYTHMIAS的方法和装置

    公开(公告)号：US20080275518A1

    公开(公告)日：2008-11-06

    申请号：US11742616

    申请日：2007-05-01

    申请人： Raja N. Ghanem ,  Robert W. Stadler ,  Xusheng Zhang ,  Karen J. Kleckner ,  Paul G. Krause

    发明人： Raja N. Ghanem ,  Robert W. Stadler ,  Xusheng Zhang ,  Karen J. Kleckner ,  Paul G. Krause

    IPC分类号： A61N1/00

    CPC分类号： A61N1/3704 ,  A61N1/3925

    摘要： A method and apparatus for determining oversensing of cardiac signals that includes a housing containing electronic circuitry, an electrode coupled to the electronic circuitry to sense cardiac signals, and a processor, positioned within the housing, to determine an oversensing characteristic associated with the cardiac signals sensed over a predetermined sensing window, and to identify oversensing in response to the determined oversensing characteristic.

    摘要翻译： 一种用于确定心脏信号过度感测的方法和装置，其包括包含电子电路的壳体，耦合到电子电路以感测心脏信号的电极以及位于壳体内的处理器，以确定与感测到的心脏信号相关联的过度感应特性 在预定的感测窗口上，并且响应于所确定的过敏特性来识别过敏。

    METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE
    10.
    发明申请
    METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE 有权
    用于检测医疗器械中的ARRHYTHMIAS的方法和装置

    公开(公告)号：US20080275517A1

    公开(公告)日：2008-11-06

    申请号：US11742628

    申请日：2007-05-01

    申请人： Raja N. Ghanem ,  Robert W. Stadler ,  Xusheng Zhang ,  Karen J. Kleckner ,  Paul G. Krause

    发明人： Raja N. Ghanem ,  Robert W. Stadler ,  Xusheng Zhang ,  Karen J. Kleckner ,  Paul G. Krause

    IPC分类号： A61N1/00

    CPC分类号： A61N1/3925 ,  A61N1/3704

    摘要： A method and apparatus for determining oversensing in a medical device that includes sensing cardiac signals, determining an oversensing characteristic associated with cardiac signals sensed during a predetermined sensing window, identifying oversensing in response to the oversensing characteristic, determining, in response to oversensing being identified, an adjusting characteristic associated with cardiac signals sensed during the predetermined sensing window, and updating a sensing parameter in response to the determined adjusting characteristic.

    摘要翻译： 一种用于确定医疗装置中的过度感测的方法和装置，包括感测心脏信号，确定与在预定感测窗口期间感测到的心脏信号相关联的过度感应特征，响应于过敏特性识别过敏，响应于被识别的过冷而确定， 与在预定感测窗口期间感测到的心脏信号相关联的调整特性，以及响应于确定的调整特性来更新感测参数。