抄録
The effect of the human ventricular electromotive force (E. M. F.) upon the formation of the QRS pattern in the precordial lead ECG was investigated with the special reference to the transfer impedance measured within the finite volume conductor of the human torso model. The main purpose of this paper is to introduce the newly-devised method and bio-medical simulation technique to construct the QRS pattern of the precordial lead ECG, on the theoretical basis of the "multiple dipole concept". The electrical potential on the precordial lead point was obtained, at every time stage of ventricular depolarization process, by summing up all scalar products of individual unit vector of ventricular E. M. F. and its relevant transfer impedance vector (V=Σ^^n__i=1H^^→ti·Z^^→ti)· The QRS waves hus constructed are quite similar in configuration with those of clinical ECG actually recorded. The multiple dipole concept was discussed for the explanation of the genesis of the precordial QRS pattern, and furthermore the nature of "proximity effect" or "non-single fixed location dipolar component" was elucidated by the technique actually measuring transfer impedance vector.
