The kinetocardiogram. III. The distribution of forces over the anterior chest.

The method of recording the movements over the chest, and estimating their magnitude, has been presented previously.' Records for this study were obtained from approximately 20 normal type I adult males. The amplitudes of the various movements have been estimated in 12 of these individuals. A few observations which have been made on both the anterior and posterior surfaces of the chest with the subject either lying on his right side or sitting. The motion of the posterior chest wall was studied in a few subjects, with the subject lying prone. Records were obtained from the right parasternal region in all intercostal spaces and designated as KVY, first, second and third intercostal spaces, etc.: whereas tracings for the left parasternal space were designated as KV2, first, second, third, fourth intercostal spaces, etc. The tracings from the left midclavicular line were designated as KV4, first, second, third, fourth, and fifth intercostal spaces; while records from the midelavicular line on the right side of the chest were designated as KV3R in the first, second, third, etc., intercostal spaces. Records obtained halfway between the left midelavicular line