Accession Number : AD0012715


Title :   FORCE BALLISTOCARDIOGRAPHY


Corporate Author : AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH


Personal Author(s) : VON WITTERN, WOLF W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/012715.pdf


Report Date : Nov 1952


Pagination or Media Count : 41


Abstract : A method is presented to compensate for the mechanical properties of the body which prevent an adequate determination of heart force from the oscillating body motion produced by the force. The ballistogram recordings of the heart force were corrected to correlate directly with the heart action. The frequency response characteristic FRC and B of the external body network (all of the body mass except the heart and liver) was electrically measured with the subject on a shake-table, the head in a free-swinging hammock, and the hands gripping fixed electrode rods above the table. A correcting network was then inserted into the recording system to produce a frequency response characteristic of the measuring system which was inversely proportional to FRC and B.


Descriptors :   *BALLISTOCARDIOGRAPHY , MEASUREMENT , NETWORKS , MASS , MOTION , ELECTRODES , RECORDING SYSTEMS , OSCILLATION , DETERMINATION , FREQUENCY RESPONSE , HEART


Subject Categories : Medical Facilities, Equipment and Supplies


Distribution Statement : APPROVED FOR PUBLIC RELEASE