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(Circulation. 1950;2:765.)
© 1950 American Heart Association, Inc.

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Analysis of H Wave of Ballistocardiogram

VINCENT DE LALLA JR. M.D.¹; MARVIN A. EPSTEIN M.D.¹; HERBERT R. BROWN JR. M.D.¹

¹ From the Department of Medicine, University of Rochester School of Medicine and Dentistry and the Medical Clinic of the Strong Memorial and Rochester Municipal Hospitals, Rochester, New York.

The observations on which this analysis is based include simultaneous ballistocardiographic and electrocardiographic tracings on subjects with complete heart block, and auricular fibrillation. Deflections of the ballistocardiogram similar to the H wave were seen to occur at a constant time interval after P in the absence of a ventricular systole. However, in fibrillation H waves were also found occasionally. A G wave of the ballistocardiogram is described and the authors discuss the part played by auricular systole, the apex thrust, and venous pressure pulses in producing the G and H waves.