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  • Title: Reproducibility of the ST-segment depression/heart rate analysis of the exercise electrocardiographic test in asymptomatic middle-aged population.
    Author: Lehtinen R, Sievanen H, Viik J, Vuori I, Malmivuo J.
    Journal: Am J Cardiol; 1997 May 15; 79(10):1414-6. PubMed ID: 9165173.
    Abstract:
    The reproducibility of the ST-segment depression against heart rate (ST/HR) hysteresis, ST/HR index, and end-exercise ST depression between the repeated exercise electrocardiographic tests were determined in 61 asymptomatic middle-aged subjects. The findings support the clinical utility of the ST/HR hysteresis, but it is noteworthy that the results also suggest that the magnitude of change in the exercise electrocardiographic variables, which has to be observed to make the clinician confident that a real diagnostic change has occurred, is surprisingly large.
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