Force Ballistocardiography
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Report Number: WADC TR 52-340
Author(s): Von Wittern, Wolf W.
Corporate Author(s): Air Force Aerospace Medical Research Lab Wright-Patterson AFB OH
Date of Publication: 1952-01
Pages: 41
DoD Task:
Identifier: AD0012715
AD Number: 12715
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.
Author(s): Von Wittern, Wolf W.
Corporate Author(s): Air Force Aerospace Medical Research Lab Wright-Patterson AFB OH
Date of Publication: 1952-01
Pages: 41
DoD Task:
Identifier: AD0012715
AD Number: 12715
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.