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1. 发明授权

US5810739A Methods and apparatus for classifying cardiac events with an implantable cardiac device 失效
标题翻译：用可植入心脏装置分类心脏事件的方法和装置
公开(公告)号：US5810739A
公开(公告)日：1998-09-22
申请号：US770767
申请日：1996-12-19
申请人： Gene A. Bornzin , Alan B. Vogel , Ali Enayat Zadeh , Jonathan A. Kleks , Raymond J. Wilson
发明人： Gene A. Bornzin , Alan B. Vogel , Ali Enayat Zadeh , Jonathan A. Kleks , Raymond J. Wilson
IPC分类号： A61N1/37 , A61N5/0452
CPC分类号： A61N1/3702
摘要： Methods and apparatus are provided for classifying cardiac events with an implantable cardiac device. Cardiac signals are stored in a buffer. When a significant cardiac event is confirmed, a corresponding segment of the stored cardiac signals is processed to generate a set of feature values. The set of feature values is compared to various sets of reference values. Each set of reference values preferably corresponds to a separate type of cardiac event, so that the cardiac device may classify the significant cardiac event by matching its set of feature values to a set of reference values. Feature values include the maximum positive and negative slew rates exhibited by the cardiac signal during the segment, the maximum positive and negative signal amplitudes, the times to reach the maximum positive and negative signal amplitudes, the area under the cardiac signal curve, the area under the cardiac signal curve above zero as compared to the area below zero, and the number of zero crossings made by the cardiac signal. Additional feature values are generated by simultaneously processing the cardiac signals measured along two different vector directions in the heart.
摘要翻译：提供了用可植入式心脏装置对心脏事件进行分类的方法和装置。心脏信号存储在缓冲区中。当确定重要的心脏事件时，处理存储的心脏信号的对应段以产生一组特征值。将特征值集合与各种参考值集进行比较。每组参考值优选对应于单独类型的心脏事件，使得心脏设备可以通过将其特征值集合与一组参考值相匹配来对重要心脏事件进行分类。特征值包括段内心脏信号显示的最大正负压摆率，最大正负信号幅度，达到最大正和负信号幅度的时间，心脏信号曲线下的面积，与零度以下的区域相比，零点以上的心脏信号曲线以及由心脏信号产生的过零点数。通过同时处理在心脏中沿着两个不同矢量方向测量的心脏信号来产生附加特征值。

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