Design and evaluation of QRS and noise detectors for ambulatory e.c.g. monitors

N. V. Thakor, J. G. Webster

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


In ambulatory e.c.g. monitoring, a high level of noise results in false QRS detection. We present a compact low-powered QRS detector design. We present a noise detector circuit that identifies most false QRS detections so that it can disable alarms. We present a standardised exercise protocol for testing the QRS detector. Data collected from subjects bending forward (for baseline drift), lifting a weight (for e.m.g.), and jogging (for motion artefact) present a realistic test set for an ambulatory QRS detector. We observe error rates of the order of 1%, the noise detector identifies more than half of these. These techniques should reduce false alarms in arrhythmia monitoring systems.

Original languageEnglish (US)
Pages (from-to)709-714
Number of pages6
JournalMedical & Biological Engineering & Computing
Issue number6
StatePublished - Nov 1982
Externally publishedYes


  • Arrhythmia
  • Detectors
  • Filters
  • Monitors
  • Noise
  • QRS

ASJC Scopus subject areas

  • Biomedical Engineering
  • Computer Science Applications


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