Further Studies on a Theory of the Ballistocardiogram

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Abstract
In a preceding paper the contribution of the pulsatile blood content of the larger arteries to the genesis of the human longitudinal ultra-low frequency beg was calculated. In this paper the contribution of the pulmonary tree is recomputed, using new information. The contributions of the small arteries, of atrial contraction and of the motion of the heart are introduced. The final results show a striking quantitative agreement with the average normal experimental ultra-low frequency displacement, velocity, and acceleration (force) beg.