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Title
  • en Influence of myopotential interference on the Wavelet discrimination algorithm in implantable cardioverter-defibrillator
Creator
    • en Mizukami, Kazuya
    • en Mitsuyama, Hirofumi
    • en Watanabe, Masaya
    • en Tenma, Taro
    • en Kamada, Rui
    • en Takahashi, Masayuki
    • en Sasaki, Ryo
    • en Maeno, Motoki
Accessrights open access
Rights
Subject
  • Other en Implantable cardioverter-defibrillator
  • Other en Tachycardia discrimination
  • Other en Morphology
  • Other en Myopotential interference
  • Other en Wavelet
  • NDC 490
Description
  • Abstract en Background: Wavelet is a morphology-based algorithm for detecting ventricular tachycardia. The electrogram (EGM) source of the Wavelet algorithm is nominally programmed with the Can-RV coil configuration, which records a far-field ventricular potential. Therefore, it may be influenced by myopotential interference. Methods: We performed a retrospective review of 40 outpatients who had an implantable cardioverter-defibrillator (LCD) with the Wavelet algorithm. The percent-match score of the Wavelet algorithm was measured during the isometric chest press by pressing the palms together. We classified patients with percent-match scores below 70% due to myopotential interference as positive morphology change, and those with 70% or more as negative morphology change. Stored episodes of tachycardia were evaluated during the follow-up. Results: The number of patients in the positive morphology change group was 22 (55%). Amplitude of the Can-RV coil EGM was lower in the positive morphology change group compared to that in the negative group (3.9 +/- 1.3 mV vs. 7.4 +/- 1.6 mV, P=0.0015). The cut-off value of the Can-RV coil EGM was 5 mV (area under curve, 0.89). Inappropriate detections caused by myopotential interference occurred in two patients (5%) during a mean follow-up period of 49 months, and one of them received an inappropriate LCD shock. These patients had exhibited positive morphology change. Conclusions: The Wavelet algorithm is influenced by myopotential interference when the Can-RV coil EGM is less than 5 mV.
Publisher en Elsevier
Date
    Issued2017-06
Language
  • eng
Resource Type journal article
Version Type VoR
Identifier HDL http://hdl.handle.net/2115/67300
Relation
  • isIdenticalTo DOI https://doi.org/10.1016/j.joa.2016.08.005
Journal
    • PISSN 1880-4276
      • en Journal of arrhythmia
      • Volume Number33 Issue Number3 Page Start214 Page End219
File
Oaidate 2023-07-26