Reference values of electrocardiogram repolarization variables in a healthy population

Christian Haarmark, Claus Graff, Mads P Andersen, Thomas Bork Hardahl, Johannes J. Struijk, Egon Toft, Joel Xue, Gordon I Rowlandson, Peter R Hansen, Jørgen K. Kanters

52 Citations (Scopus)

Abstract

Introduction: Reference values for T-wave morphology analysis and evaluation of the relationship with age, sex, and heart rate are lacking in the literature. In this study, we characterized T-wave morphology in a large sample of healthy individuals. Method: A total of 1081 healthy subjects (83% men; range, 17-81 years) were included. T-wave morphology variables describing the duration, area, slopes, amplitude, and distribution were calculated using 10-second digital electrocardiogram recordings. Multivariate regression was used to test for dependence of T-wave variables with the subject age, sex, and heart rate. Results: Lead V5 (men vs women) T-wave variables were as follows: amplitude, 444 versus 317 μV; area, 48.4 versus 33.2 ms * mV; Tpeak-Tend interval, 94 versus 92 milliseconds; maximal descending slope, -5.15 versus -3.69 μV/ms; skewness, -0.24 versus -0.22; and kurtosis, -0.36 versus -0.35. Tpeak-Tend interval, skewness, and kurtosis were independent of age, sex, and heart rate (r2 < 0.05), whereas Bazett-corrected QT-interval was more dependent (r2 = 0.40). Conclusion: A selection of T-wave morphology variables is found to be clinically independent of age, sex, and heart rate, including Tpeak-Tend interval, skewness, and kurtosis.

Original languageEnglish
JournalJournal of Electrocardiology
Volume43
Issue number1
Pages (from-to)31-9
Number of pages9
ISSN0022-0736
DOIs
Publication statusPublished - Jan 2010

Keywords

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Electrocardiography
  • Female
  • Heart Conduction System
  • Heart Rate
  • Humans
  • Male
  • Middle Aged
  • Minnesota
  • Reference Values
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Young Adult

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