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(Circulation. 1952;5:408.)
© 1952 American Heart Association, Inc.

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The Tricardiograph: A Rapid Screening Method for Cardiac Disease

J. LEONARD BRANDT M.D.¹; WILLIAM DOCK M.D.¹; ROBERT LANDSMAN ¹; CHARLES PASSANNANTE M.E.¹

¹ From the Department of Medicine, State University of New York at New York City, College of Medicine, and the X-Ray Division, F-R Machine Works, Long Island City, New York.

To take slit kymograms of the left hemithorax on 6 by 8 inch film, a carrier was designed which can be fitted to the arms of a fluoroscope, replacing the screen. On the lateral and cephalad corner, six seconds of galvanometer trace are recorded, the slit kymograph being exposed during the interval from 3.0 to 4.5 seconds. With two galvanometers, the electrocardiogram and ballistocardiogram can be inscribed, thus timing the motions of the heart border, and permitting correlation of ballistic phenomena with ventricular ejection. This device also has promise as a screening method for detecting cardiac disease.