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(Circulation. 1955;11:767.)
© 1955 American Heart Association, Inc.

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A Two-Dimensional Ballistocardiographic Study of 59 Apparently Normal Persons

An Analysis of the IJ Segment as it Relates to Body Surface Area and the Anatomic Position of the Heart

GWENDOLYN L. MORRIS M.D.¹ JOHN R. BRAUNSTEIN M.D., PH.D.¹

¹ From the Cardiac Laboratory, Cincinnati General Hospital, and the Department of Internal Medicine, College of Medicine, University of Cincinnati, Cincinnati. Ohio.

Simultaneous longitudinal and transverse ballistocardiograms were obtained from 59 apparently normal persons. A highly significant correlation was found to exist between body surface area and basal longitudinal "IJ" amplitude. The significance of this is discussed. The transverse IJ amplitude is shown to be related to the rotation of the heart about the anteroposterior axis of the body.