單極誘導心電圖とベクトル心電圖の關係(基礎的問題)

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1). In this paper we reported some fundamental relationships between the vectorcardiogram and the unipolar electrocardiogram when they concerned with electric sources of various types, such as the electric dipole, electric double layer or dipolar electric source of wide pole-distance. The VCG and unipolar ECG used for these purposes were all calculative ones. The application of these calculative results for practical use will require the experimental proofs of the correctness of their findings. When the electric dipole or the double layer is concerned in electric source, we have not yet the way to demonstrate the correctness of these calculative results, for they are hypothetical ones. But, if the results of calculations in the fields of electric sources of many other types were coincident well with those of experiments, we may treat the calculative results as reliable ones even in the field of electric dipoles or electric double layers, because the calculations are made following the same principle governing the potential distribution in electro-static field or stational current field. The correctness of these calculations in the field of electric source of wide pole-distance or of many other types was proved experimentally well enough to be able to apply them for practical use in our previous reports. So, the results of these calculattions in this paper may be treated as useful ones in any case of electric source. 2). We found that we could imagine not only the magnitude and the direction but also the position of electric source in volume conductor from the relationship between the VCG and unipolar ECG. 3). Consequently arrised that we could analyse the activation process of human ventricles by using the VCG and unipolar ECG in conbination. For these purposes it is desirable to use the VCG having as little deformation as possible. 4). Strictly speaking, the unipolar ECG could not be the simple scalar projection of VCG on the line connecting the leading point to isoelectric center in the heart as Lasser, Grishman and others have said, except such a specific case that distant from every point to lead. 5). In major aspect, but, the unipolar tracing was deflected in positive side when the loop of VCG was recorded in the near side of isoelectric center to the leading point and was deflected in the negative side when it recorded in remote side. But their relationships were not so simple as scalar projection in geometrical sense. 6). An example of each VCG by mean of polyography and cube-system method and of each ECG of standard unipolar and bipolar extremity lead and standard unipolar chest lead of normal adult was obtained by calculation basing on a certain process of ventricular activation. Such a method to construct the ECG in various leads and the VCG of three planes reversely from heart model by calculation may be valuable for criticism of doublet theory and other interpretaions on electrical phenomena of heart. 7). The unipolar chest lead ECG by mean of Wilson's zero-potential electrode showed little difference from that of absolute potential variation, but the unipolar extremity lead ECG by meand of Wilson's method differed in relatively high grade from that. These differences between the unipolar ECG of Wilson's method and absolute potential variation may be the critical data for discussion of the reliability of zero-potential electrode by Wilson at present having no profitable method to criticize it.
社団法人日本循環器学会の論文
1954-10-20

單極誘導心電圖とベクトル心電圖の關係(基礎的問題)

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