Tachyarrhythmia detection by implantable defibrillator

Pan Kongyan, Nitish V. Thakor

Research output: Contribution to journalConference articlepeer-review

Abstract

A previously published sequential hypothesis testing (SHT) algorithm is extended to the problem of the discrimination of superventricular tachycardia (SVT) and ventricular tachycardia (VT) signals by an automatic implantable cardioverter/defibrillator. The SHT algorithm compares a likelihood function against the detection thresholds at successive 1-s stages. It allows the desired accuracy to be preset and attains higher accuracy levels only at the cost of increased detection time. The implementation of the algorithm and experimental results are described. The results show that the SHT algorithm correctly discriminates most cases of SVT and VT when the rates in the atrial and ventricular leads differ. When the rates are comparable, the time delay between a beat in the atrial lead and the ventricular lead is determined. In the case of SVT the delay is always positive, whereas for VT with retrograde conduction it is zero or negative.

Original languageEnglish (US)
Pages (from-to)1405-1406
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume11 pt 5
StatePublished - Nov 1 1989
EventImages of the Twenty-First Century - Proceedings of the 11th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 - Seattle, WA, USA
Duration: Nov 9 1989Nov 12 1989

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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