A real-time system for high-resolution ECG signal averaging using the analog SFP alignment technique

OJ Escalona, MA Diaz, JE Parra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have developed a real-time, signal averaging system for high-resolution EGG, which implements an analog version of the Single Fiducial Point (SFP) alignment technique. It consist essentially in a second order, highpass (3Hz), Butterworth filtering operation applied to an ECG signal presenting predominantly monopolar QRS complexes, then, this operation is complemented by zero crossing detection after a signal amplitude threshold level crossing detection. The ECG signal is also lowpass filtered at 30 Hz to reduce the possibility of ambiguities at the zero crossing point (the SFP point), in the presence of 60 Hz mains interference, or other soul ces of high frequency noise. The output pulse from the analog SFP detector was used as the trigger signal channel in a digital averaging oscilloscope, with a moving average function. The performance of this ECG averaging system was evaluated in the spectral range between 100 and 300 Hz, which is the highest frequency bandwidth of interest in high-resolution electrocardiography. The system was capable of extracting cardiac electrical events, as short as 2 ms of duration, in the P-R interval. Hence, it can be appropriate for P-wave and His bundle potentials analysis.
Original languageEnglish
Title of host publicationUnknown Host Publication
Place of Publication345 E 47TH ST, NEW YORK, NY 10017 USA
PublisherIEEE
Pages299-301
Number of pages3
Volume2
ISBN (Print)0-7803-4434-0
DOIs
Publication statusPublished - 15 Jul 1998
Event2nd IEEE INTERNATIONAL CARACAS CONFERENCE ON DEVICES, CIRCUITS AND SYSTEMS (ICCDCS 98) - Isla Margarita, Venezuela
Duration: 15 Jul 1998 → …

Conference

Conference2nd IEEE INTERNATIONAL CARACAS CONFERENCE ON DEVICES, CIRCUITS AND SYSTEMS (ICCDCS 98)
Period15/07/98 → …

Keywords

  • Medical signal processing
  • real-time systems
  • Butterworth filtering operation
  • alignment technique
  • analog SFP alignment technique
  • cardiac electrical events
  • digital averaging oscilloscope
  • high-resolution ECG signal averaging
  • lowpass filtering
  • monopolar QRS complexes
  • moving average function
  • output pulse
  • real-time system
  • signal amplitude threshold level crossing
  • single fiducial point
  • trigger signal channel
  • zero crossing detection
  • Maximum coherence matching.

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  • Cite this

    Escalona, OJ., Diaz, MA., & Parra, JE. (1998). A real-time system for high-resolution ECG signal averaging using the analog SFP alignment technique. In Unknown Host Publication (Vol. 2, pp. 299-301). 345 E 47TH ST, NEW YORK, NY 10017 USA: IEEE. https://doi.org/10.1109/ICCDCS.1998.705853