Abstract The present study is one in a series designed to elucidate the genesis of the precordial motions. It is concerned with an attempt to learn whether low-frequency precordial tracings (kinetocardiograms [KCG]) can be utilized as an index to the time of onset of ejection and filling. A number of observers have published data concerning the time elapsing between the beginning of electrical excitation and the start of the pressure rise in the pulmonary artery and the aorta.1-3 These studies indicate that the right and left ventricles begin to eject at approximately 0.08 and 0.10 second, respectively, after the onset of the QRS. Similar studies indicate that ventricular filling begins about 0.10 second after the beginning of the second heart sound.2 Consequently, this study is concerned with precordial motions occurring at these particular times, in the hope that such events may afford information which can be readily and simply References 1. Braunwald, E.; Fishman, A. P., Cournand, A., and Richards, D. W.: Events in the Cardiac Chambers, Pulmonary Artery and Aorta in Man , Circulation Res. 4:100, 1956.Crossref 2. Braunwald, E.; Moscowitz, H. L.; Amran, S. S.; Lasser, R. P.; Sapin, S. L.; Himmelstein, A.; Ravitch, M. M., and Gordon, A. J.: Timing of Electrical and Mechanical Events of the Left Side of the Human Heart , J. Appl. Physiol. 8:310, 1955. 3. Coblentz, B.; Harvey, R. M.; Ferrer, M. I., and Cournand, A.: The Relationship Between Electrical and Mechanical Events in the Cardiac Cycle of Man , Brit. Heart J. 11:1, 1947.Crossref 4. Eddleman, E. E., Jr.; Willis, K.; Reeves, T. J., and Harrison, T. R.: The Kinetocardiogram: I. Method of Recording Precordial Movements , Circulation 8:269, 1953.Crossref 5. Eddleman, E. E., Jr.; Willis, K.; Christianson, L.; Pierce, J. R., and Walker, R. P.: The Kinetocardiogram: II. The Normal Configuration and Amplitude , Circulation 8:370, 1953.Crossref 6. Eddleman, E. E., Jr., and Willis, K.: The Kinetocardiogram: III. The Distribution of Forces over the Anterior Chest , Circulation 8:569, 1953.Crossref 7. Eddleman, E. E., Jr.; Hefner, L.; Reeves, T. J., and Harrison, T. R.: Movements and Forces of the Human Heart: I. The Genesis of the Apical Impulses , A. M. A. Arch. Int. Med. 99:401, 1957.Crossref 8. Prinzmetal, M.: Personal communication to the authors.
A.M.A. Archives of Internal Medicine – American Medical Association
Published: Mar 1, 1958