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    • 4. 发明申请
    • Refractory period tracking and arrhythmia detection
    • 难治期跟踪和心律失常检测
    • US20050075676A1
    • 2005-04-07
    • US10680528
    • 2003-10-07
    • D. DenoRuth KlepferWilliam HavelDavid SchneiderVincent Splett
    • D. DenoRuth KlepferWilliam HavelDavid SchneiderVincent Splett
    • A61N1/362A61N1/365
    • A61N1/365A61N1/3622
    • Techniques for estimating the temporal refractory period of a heart, for adjusting a parameter for delivery of extra-systolic stimulation (ESS) therapy and for detecting an arrhythmia during delivery of ESS therapy are disclosed. In some embodiments, probe pulses are periodically delivered to estimate the location of the end boundary of the refractory period, and accordingly estimate its length. In some embodiments, the parameter is adjusted based on estimated length of the refractory period. For example, an extra-systolic interval (ESI) for delivery of ESS is adjusted to be a fixed interval longer than estimated lengths of the refractory period. In other embodiments, the parameter is adjusted based on a measured delay (or latency) between delivery of an ESS pulse and detection of an evoked response resulting from the pulse. In some embodiments, delays between delivery of an ESS pulse and detection of a subsequent depolarization are monitored to detect an arrhythmia.
    • 公开了用于估计心脏的时间不应期的技术,用于调整用于递送收缩期刺激(ESS)治疗的参数和用于在递送ESS治疗期间检测心律失常的技术。 在一些实施例中,周期性地递送探针脉冲以估​​计不应期的末端边界的位置,并因此估计其长度。 在一些实施例中,基于估计的不应期的长度来调整参数。 例如,用于递送ESS的收缩期间期(ESI)被调整为比不应期的估计长度更长的固定间隔。 在其他实施例中,基于在递送ESS脉冲和从脉冲产生的诱发响应的检测之间的测量延迟(或等待时间)来调整参数。 在一些实施例中,监测递送ESS脉冲和随后去极化的检测之间的延迟以检测心律失常。