Relationship Between the Ballistocardiogram and the Movement of Blood from the Left Ventricle in the Dog

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Abstract
This study was undertaken to investigate the possible relation between myocardial contractility and the pattern of the head-foot force ballistocardiogram. Dogs previously prepared with implanted aortic flowmeters were studied on a specially constructed ballistocardiograph. A direct relationship was found between the amplitude of the early systolic waves of the ballistocardiogram and myocardial contractility as measured by the peak acceleration of blood from the left ventricle.