Abstract
I would like to conclude that Grishman's system is more sensitive to RVH and Kimura's system is more sensitive to LVH, because Grishman's system has its electrode on the right side of chest and Kimura's has on the left side. In spite of the difference of lead system, QRS vectors deviate to right anterior direction in RVH and to left posterior superior in LVH. These deviations are the essential change accompanied with ventricular hypertrophy. Application of these facts to the aid of electrocardiographic diagnosis for ventricular hypertrophy makes diagnosis better. Kimura's pattern criteria is based theoritically o these spatial deviation of QRS vector and has not voltage factor which is easily affected by the thickness or deformity of chest wall and location of heart in thorax, etc. Therefore it is possible to pick up LVH by Kimura's criteria among the negative cases by voltage criteria and we think it is desirable to use both voltage and pattern criteria.
