Ballistocardiographic Instrumentation

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Abstract
An analog method is described for solving some of the mechanical problems associated with the recording of ballistocardiograms. An L‐C‐R circuit is used as the analog of the body coupled to a fixed table. It is concluded that no technical obstacles exist to the widespread use of ballistocardiography, through equipment similar to that described here. Clinical problems in the interpretation are not discussed.