IJCS | Volume 33, Nº3, May / June 2020

265 Figure 1 - Measurement sequencing of a QT interval. Figure 2 - Reproducibility of QT dispersion measurements before (A) and during (B) effort, assessed using the Bland-Altman method. Differences in baseline QT dispersion means between the observers (ms) Differences in peak QT dispersion means between the observers (ms) Baseline QT dispersion mean by two observers (ms) Peak QT dispersion mean by two observers (ms) Barcelos et al. QT interval dispersion in exercise test Int J Cardiovasc Sci. 2020; 33(3):263-271 Original Article