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1. The graphic recording of movements of the body imparted by ballistic forces (cardiac contraction and ejection of blood, ventricular filling, acceleration, and deceleration of blood flow through the great vessels); these minute movements are amplified and recorded on moving chart paper after being translated into an electrical potential by a pickup device.
2. The study and interpretation of ballistocardiograms.
the recording of body movements in reaction to the beating of the heart and the circulation of the blood.