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ELECTROCARDIOGRAPHIC R-WAVE DETECTOR

  • US 3,590,811 A
  • Filed: 12/06/1968
  • Issued: 07/06/1971
  • Est. Priority Date: 12/06/1968
  • Status: Expired due to Term
First Claim
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1. In electrocardiographic monitoring equipment, an R-wave detection circuit comprising means for attenuating the low frequency components with respect to the high frequency components in an electrocardiographic signal to form a signal having one or more peaks corresponding to the QRS complex in each electrocardiographic waveform, means for deriving a threshold level which is a fraction of the peak amplitude of the formed signal averaged out over a number of cycles, said fraction having a value such that said threshold level is below at least one of the peaks in the formed signal corresponding to the QRS complex in the electrocardiographic waveform and above any peaks in the formed signal corresponding to the P- and T-waves in the electrocardiographic waveform, means for comparing the instantaneous value of said formed signal to said threshold level, and indicating means responsive to the operation of said comparing means for indicating occurrence of said QRS complex.

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