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Blood from the heart is mainly ejected upwards along the ascending aorta. This produces a small downward accelerating force on the rest of the body, and this can be detected if the subject is laid on a special force platform. The forces involved are in the range 0-7 mg with frequency components from d.c. to 40 Hz. The platform requires a very low friction suspension and such devices have been used in research to develop techniques to assess the performance of the heart. They are not found in clinical use.
Content and Design Copyright 2000 Dr. Malcolm C Brown. See Title Page for more details