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