Myocardial infarction and ischemia characterization from T-loop morphology in VCG

Some particular aspects of T-wave morphology are considered for the characterization and quantification of heterogeneous repolarization, using the vectorcardiogram (VCG). The orthogonal Frank leads were synthesised from the standard 12-lead ECG. For this purpose, three parameters were obtained from the VCG with two different methods of considering the zero point. The population-based ECG-ILSA (Italian Longitudinal Study on Aging) database was used, and those patients classified as healthy [328], with myocardial ischemia [123], myocardial infarction [172] or both (59) were included in this study. The modified parameters yielded higher discriminative power. From a statistical analysis, it was found that the mean values of all three parameters of the healthy subjects group were statistically different from those of the ischemia or myocardial infarction groups.