Detection of cardiac arrhythmias using template matching by signature analysis,申请号US19920865320-传众专利搜索

Detection of cardiac arrhythmias using template matching by signature analysis

申请公布号：US5273049(A)

申请号：US19920865320

申请日期：1992.04.09

申请公布日期：1993.12.28

申请人：

TELECTRONICS PACING SYSTEMS, INC.

发明人：STEINHAUS, BRUCE M.;GREENHUT, SAUL E.

分类号：A61N1/362;A61N1/39;(IPC1-7):A61B5/047

主分类号：A61N1/362

摘要：A method and apparatus for detecting cardiac arrhythmias are disclosed. The detecting method and apparatus sense cardiac electrical signals when the heart is functioning in a known cardiac state, such as a physiologically normal cardiac state, then define and store an array of amplitude windows wherein each sample in the array of amplitude windows corresponds to a sample of the known cardiac signal. Each amplitude window delineates a range of signal amplitudes bracketing the amplitude of the known cardiac electrical signal sample. The array of amplitude windows corresponds in time to periodically occurring known cardiac signal samples occurring within a predetermined time of interest. Subsequently, when the heart is functioning in an unknown cardiac state, the method and apparatus monitor cardiac electrical signals by time aligning samples and comparing, on a sample by sample basis, the amplitude of unknown state cardiac signal samples with the amplitude range within the stored array of amplitude window samples. The relative number of samples falling outside the amplitude windows is the basis for analyzing cardiac signal morphology for the purpose of detecting cardiac arrhythmias.