Reevaluation of the Solid Angle Approach in Electrocardiography Bearing on the Lead-Field Concept

概要

論文の詳細を見る
The solid angle formula in the theory of electrocardiography seemed to be too bold to be acceptable even as a first approximation, especially in unipolar chest leads, since this formula holds primarily in an infinite homogeneous conductor while the exploring electrode is placed so close to the heart. Namely, at least the boundary of the precordial chest wall was felt necessary to be taken into consideration. Considering this as a semi-infinite homogeneous conductor with some other assumed conditions and applying the lead field concept, it was found that the solid angle formula still holds but with a different constant. This proof implies that in such a case just like in an infinite homogeneous conductor the potential at the exploring electrode concerns merely with the shape and position of the boundary of the excited cardiac regions, which lies in most instants much deeper than the actual positions of some of the excited parts. It is to be noted, however, that for the conventional limb leads we have nothing to conclude about the theoretical validity of the solid angle formula.
International Heart Journal刊行会の論文