INTRAVENTRICULAR ELECTROCARDIOGRAPHIC STUDY ON RIGHT VENTRICULAR HYPERTROPHY ESPECIALLY IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE

At right heart catheterization, a catheter with a platinum electrode was used for recording bipolar electrocardiograms between each of the outflow tract, mid and inflow tract of the right ventricle and precordium. In the individual clinical cases including those of chronic obstructive pulmonary disease, the ratio right ventrcular element to left ventricular element was calculated, which anther named A ratio. Whether or not there was right ventricular predominance was examined by employing the A ratio as the index. Examination for correlationship was made between the A ratio, pulmonary arterial mean pressure (PAm) and cardiac index (CI), and the following conclusions have been obtained. 1) At the right ventricular outflow tract or mid, between the pulmonary arterial mean pressure and A ratio there was observed an significant positive correlationship (outflow, P