Advanced search

Morphology discrimination in implantable cardioverter-defibrillators: consistency of template match percentage during atrial tachyarrhythmias at different heart rates

(2008) EUROPACE. 10(9). p.1060-1066
Author
Organization
Abstract
Background: Morphology discrimination (MD) in implantable cardioverter-defibrillators (ICDs) is based on the comparison of the ventricular etectrogram during tachycardia with a stored reference template obtained during baseline rhythm. However, the effect of heart rate on the template match percentage during supraventricular tachyarrhythmias (SVT) is not known. The purpose of this study was to evaluate the performance of the template match percentage during SVT at different heart rates. Methods and results: Stored electrograms of 868 tachyarrhythmias from 88 patients with a dualchamber ICD (St Jude Medical, USA) were analysed by the investigators. The effect of heart rate on template match percentage was estimated by regression analysis. For performance measures, data were corrected for multiple episodes in a patient by using the generalized estimating equation method. The mean template match percentage was 86.6 +/- 22.2% (median 100%) for SVT episodes. No significant differences in template match percentage between fast [ventricular cycle length (CL) 300-350 ms] and slow (ventricular CL >400 ms) SVTs were observed (85.4 +/- 27.0 vs. 87.1 +/- 19.7%). Using nominal settings, MD alone provided sensitivity and specificity of 70.2% and 89.4% overall, respectively. Morphology discrimination in conjunction with rate branch analysis, sudden onset, and stability yielded sensitivity and specificity of 98.5% and 91.2%, respectively. Conclusion: Morphology discrimination has a consistently high template match percentage during SVFs, which is independent of ventricular CL. The consistent high match percentage results in high specificity for arrhythmia discrimination.
Keywords
arrhythmias, implantable cardioverter-defibrillator, atrial fibrillation, morphology, electrogram, SUPRAVENTRICULAR TACHYCARDIA, VENTRICULAR-TACHYCARDIA, RHYTHM DISCRIMINATION, ENDOCARDIAL ELECTROGRAM, ALGORITHM, ICD, PERFORMANCE, MORTALITY, TRIAL

Citation

Please use this url to cite or link to this publication:

Chicago
Theuns, Dominic AMJ, Maximo Rivero-Ayerza, Dick M Goedhart, Max Miltenburg, and Luc Jordaens. 2008. “Morphology Discrimination in Implantable Cardioverter-defibrillators: Consistency of Template Match Percentage During Atrial Tachyarrhythmias at Different Heart Rates.” Europace 10 (9): 1060–1066.
APA
Theuns, D. A., Rivero-Ayerza, M., Goedhart, D. M., Miltenburg, M., & Jordaens, L. (2008). Morphology discrimination in implantable cardioverter-defibrillators: consistency of template match percentage during atrial tachyarrhythmias at different heart rates. EUROPACE, 10(9), 1060–1066.
Vancouver
1.
Theuns DA, Rivero-Ayerza M, Goedhart DM, Miltenburg M, Jordaens L. Morphology discrimination in implantable cardioverter-defibrillators: consistency of template match percentage during atrial tachyarrhythmias at different heart rates. EUROPACE. 2008;10(9):1060–6.
MLA
Theuns, Dominic AMJ et al. “Morphology Discrimination in Implantable Cardioverter-defibrillators: Consistency of Template Match Percentage During Atrial Tachyarrhythmias at Different Heart Rates.” EUROPACE 10.9 (2008): 1060–1066. Print.
@article{8151263,
  abstract     = {Background: Morphology discrimination (MD) in implantable cardioverter-defibrillators (ICDs) is based on the comparison of the ventricular etectrogram during tachycardia with a stored reference template obtained during baseline rhythm. However, the effect of heart rate on the template match percentage during supraventricular tachyarrhythmias (SVT) is not known. The purpose of this study was to evaluate the performance of the template match percentage during SVT at different heart rates. 
Methods and results: Stored electrograms of 868 tachyarrhythmias from 88 patients with a dualchamber ICD (St Jude Medical, USA) were analysed by the investigators. The effect of heart rate on template match percentage was estimated by regression analysis. For performance measures, data were corrected for multiple episodes in a patient by using the generalized estimating equation method. The mean template match percentage was 86.6 +/- 22.2% (median 100%) for SVT episodes. No significant differences in template match percentage between fast [ventricular cycle length (CL) 300-350 ms] and slow (ventricular CL >400 ms) SVTs were observed (85.4 +/- 27.0 vs. 87.1 +/- 19.7%). Using nominal settings, MD alone provided sensitivity and specificity of 70.2% and 89.4% overall, respectively. Morphology discrimination in conjunction with rate branch analysis, sudden onset, and stability yielded sensitivity and specificity of 98.5% and 91.2%, respectively. 
Conclusion: Morphology discrimination has a consistently high template match percentage during SVFs, which is independent of ventricular CL. The consistent high match percentage results in high specificity for arrhythmia discrimination.},
  author       = {Theuns, Dominic AMJ and Rivero-Ayerza, Maximo and Goedhart, Dick M and Miltenburg, Max and Jordaens, Luc},
  issn         = {1099-5129},
  journal      = {EUROPACE},
  keywords     = {arrhythmias,implantable cardioverter-defibrillator,atrial fibrillation,morphology,electrogram,SUPRAVENTRICULAR TACHYCARDIA,VENTRICULAR-TACHYCARDIA,RHYTHM DISCRIMINATION,ENDOCARDIAL ELECTROGRAM,ALGORITHM,ICD,PERFORMANCE,MORTALITY,TRIAL},
  language     = {eng},
  number       = {9},
  pages        = {1060--1066},
  title        = {Morphology discrimination in implantable cardioverter-defibrillators: consistency of template match percentage during atrial tachyarrhythmias at different heart rates},
  url          = {http://dx.doi.org/10.1093/europace/eun194},
  volume       = {10},
  year         = {2008},
}

Altmetric
View in Altmetric
Web of Science
Times cited: