Space-axis analysis of the body surface ECG information.

概要

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On the concept of the ventricular gradient, we studied location-related (space-axial) analysis of the ECG information with integrating the ECG data of the body surface mapping time-relatedly. The study population consisted of 25 normals, and 56 patients with prior myocardial infarction (MI) who were divided into anterior, inferior and posterior MI. As the first step, the whole myocardium was classified into 3 portions according to the infarct sites. The assumption that the old infarct site is electrically silent proved to be true by analyzing the configuration of the iso-QRST area (G) maps which were converted to the vectors in the multidimensional space. This resulted in the definition of the standard map vectors for each of 4 myocardial sites (anterior, inferior, posterior and the rest). As the next step, the actual G maps were explained by the multiple regression analysis using the standard vectors as the independent variables. All estimated maps fitted well (0.77<R<0.99) to the actual maps, as well as the infarct sites were distinguished from intact ones by the smaller coefficient. In conclusion, we would like to introduce a new EGG approach to the diagnosis of the local myocardial abnormalities.
一般社団法人日本生体医工学会の論文