Morphological descriptors based on Eigen value decomposition for P-wave analysis

In this study, several morphological parameters to assess the P-wave from the surface electrocardiogram are proposed and analysed. In order to evaluate spatial features, two parameters are defined: P-wave complexity and P-wave residuum. Additionally, in order to evaluate beat to beat features, the P-wave regularity is defined. All three parameters are computed from the eigenvalue decomposition of the original data, and were applied on patients who suffered from either dilated or ischemic cardiomyopathy. The results showed that both the P-wave complexity and P-wave regularity are able to find and emphasize interpatient differences, whereas the results of P-wave residuum where rather similar for all patients.