Abstract
The author calculated the angle (θR) between the direction of the electric charge that a heart had when it was on the top of BIT, and the line drawn between the right hand and left foot lead point, from the standard EKG investigated by 143 healthy men, by means of the orthogonal isosceles triangle coodinates. In case of normal cardiac position θR is limited from + 30° to - 40°, in case of the standing is larger, and the lying heart is smaller than the above limit. There is any concern between θR and Schlcmka's type-index, or between θR and the classification of Herrmann & Wilson : however there are few exceptions in case of later. The author considers θR is better than S's typeindex or the classification of H. & W., because they are calculated or classified by the consideration of the Q or S-wave, but disregarded the cardiac position-type. The author proposes that he would like to call these hearts that θR is larger than + 30° as "Standing", and is smaller than - 40° as "Lying", also in case of θR is limited from + 30° to - 40° is called as "Normal".
