Trial Manufacture of a Coordinate Changer for Vectorcardiogram

Abstract

There are so many kinds of vectorcardiographic lead systems that a great deal of inconvenience arises in the clinical use of vector cardiography.
We have already reported a mutual transformation theory in vectorcardiogram (VCG) by which a VCG of any lead system could be transformed into a VCG of any other lead system without moving the electrodes among VCG lead systems of McFee, Schmitt, Frank, Grishman, Kimura and Wenger-Hupka.
According to the theory, the authors devised a VCG coordinate changer, which can perferm automatically the above mentioned mutual transformation of VCG_s with the aid of the coefficients of our transformation equations.
Moreover, with the use of the coordinate changer, the loops of VCG, as a whole, can rotated to various directions. Therefore, VCG can freely observed from optional directions of a human body.