Patent · US Expired

Bi-spectral filtering of electrocardiogram signals to determine selected QRS potentials

US5117833A · kind A · utility

25Cited by
5References
16Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 13, 1990
Grant dateJun 2, 1992
Priority date—
Expiry dateNov 13, 2010

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61B5/7257
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

Method and apparatus for analyzing electrocardiogram signals to ascertain any defects or abnormalities in heart activity. Sensed, orthogonal x, y and z input signals are processed to obtain QRS onset and then passed through first and second spectral filters having respective passbands of 70-200 hertz and 40-200 hertz in order to establish QRS offset and accurate determinations of RMS voltage values and (LAS) low amplitude signals in the terminal QRS portion of the ECG signal. A spectral filtering of the x, y and z input signals with 150-250 hertz bandpass window also allows determination of certain high frequency activity in the midportions of the QRS.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.