Reproducibility of ST and ventricular gradient vectors

In this study, we tested the reproducibility of the ST vectors at the J point and 60 ms after the J point, and the reproducibility of the ventricular gradient. The reproducibility of these ECG variables was compared with the proposed thresholds for ischemia detection by serial ECG analysis (comparison of an acute ECG suspected of the presence of acute ischemia with a previously made non-ischemic ECG in the same patient).