Reproducibility of the ST-segment depression/heart rate analysis of the exercise electrocardiographic test in asymptomatic middle-aged population

The findings of this study on reproducibility of the exercise ECG variables in 61 asymptomatic middle-aged subjects give further support to the clinical utility of the STHR hysteresis. The results also indicated that the observed change in the exercise ECG variable between repeated measurements must be large to make the clinician confident that a real diagnostic change has occurred.