R. Lehtinen et al., REPRODUCIBILITY OF THE ST-SEGMENT DEPRESSION HEART-RATE ANALYSIS OF THE EXERCISE ELECTROCARDIOGRAPHIC TEST IN ASYMPTOMATIC MIDDLE-AGED POPULATION, The American journal of cardiology, 79(10), 1997, pp. 1414
The reproducibility of the ST-segment depression against heart race (S
T/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 electrocard
iographic variables, which has to be observed to make the clinician co
nfident that a real diagnostic change has occurred, is surprisingly la
rge.