Method and apparatus for assessing and treating atrial fibrillation risk
    2.
    发明授权
    Method and apparatus for assessing and treating atrial fibrillation risk 有权
    评估和治疗房颤风险的方法和装置

    公开(公告)号:US07142912B2

    公开(公告)日:2006-11-28

    申请号:US10194435

    申请日:2002-07-12

    IPC分类号: A61N1/08

    摘要: A method and apparatus for assessing the risk of atrial fibrillation in a patient by calculating the relative frequency of short and long intervals between successive heart beats during sinus rhythm is presented. An imbalance of short over long sinus intervals has been found to indicate a higher risk of atrial fibrillation. An implantable cardiac device may be configured to automatically deliver interventional therapy to restore sinus interval balance when such an imbalance is detected.

    摘要翻译: 提出了一种通过计算窦性心律连续心脏跳动之间的短间隔和长间隔的相对频率来评估患者心房颤动风险的方法和装置。 发现短窦间隔短暂的不平衡表明心房颤动的风险更高。 可植入的心脏装置可以被配置为当检测到这种不平衡时,自动地进行介入治疗以恢复窦间隔平衡。

    Noise canceling cardiac electrodes
    3.
    发明授权
    Noise canceling cardiac electrodes 有权
    降噪心电极

    公开(公告)号:US07499750B2

    公开(公告)日:2009-03-03

    申请号:US10738608

    申请日:2003-12-17

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

    摘要: Implementing a subcutaneous medical electrode system involves positioning a number of electrode subsystems in relation to a heart so that noise cancellation provides an improved signal to noise ratio of the cardiac signal and/or to provide one electrode arrangement preferential for cardiac signals and another arrangement preferential for noise signals. One of the electrode subsystems so positioned may include one or more can electrodes located on a housing enclosing a medical device. The medical device may be configured to provide therapeutic, diagnostic, or monitoring functions, including, for example, cardiac arrhythmia therapy.

    摘要翻译: 实施皮下医疗电极系统包括相对于心脏定位多个电极子系统,使得噪声消除提供改善的心脏信号的信噪比和/或提供优于心脏信号的一个电极布置,以及优选的 噪声信号。 如此定位的电极子系统之一可以包括位于包围医疗装置的壳体上的一个或多个罐电极。 医疗装置可以被配置为提供治疗,诊断或监测功能,包括例如心律失常治疗。

    Biopotential signal source separation using source impedances
    5.
    发明授权
    Biopotential signal source separation using source impedances 有权
    使用源阻抗的生物电位信号源分离

    公开(公告)号:US07555335B2

    公开(公告)日:2009-06-30

    申请号:US10821206

    申请日:2004-04-08

    IPC分类号: A61B5/0428

    摘要: Cardiac methods and devices that separate signals using at least two composite signals acquired at least at two input impedances. A target source impedance may be selected, and a cardiac signal may be separated from composite signals using the selected target source impedance. Medical systems include a cardiac device having a housing that provides amplification circuitry configured to have a first amplifier input impedance and a second amplifier input impedance, such as using two separate circuits or switching between two input impedances. One or more electrode assemblies are coupled to the amplification circuitry. A signal processor is provided in the housing configured to separate a source signal using a first composite signal detected at the first input impedance and a second composite signal detected at the second input impedance. The phase response of the first input amplifier circuit is about equal to that of the second input amplifier circuit.

    摘要翻译: 使用至少两个输入阻抗获取的至少两个复合信号分离信号的心脏方法和装置。 可以选择目标源阻抗,并且可以使用所选择的目标源阻抗将心脏信号与复合信号分离。 医疗系统包括具有壳体的心脏装置,其提供被配置为具有第一放大器输入阻抗和第二放大器输入阻抗的放大电路,例如使用两个分离的电路或在两个输入阻抗之间切换。 一个或多个电极组件耦合到放大电路。 信号处理器设置在壳体中,配置成使用在第一输入阻抗处检测到的第一复合信号和在第二输入阻抗处检测到的第二复合信号来分离源信号。 第一输入放大器电路的相位响应大约等于第二输入放大器电路的相位响应。