Seitz W S, McIlroy M B
Cardiovascular Research Institute, University of California, San Francisco 94143.
Cardiovasc Res. 1988 Aug;22(8):571-4. doi: 10.1093/cvr/22.8.571.
The principle of conservation of momentum and the observation that blood acceleration in the ascending aorta is approximately constant during ventricular ejection was applied to develop a new interpretation of the HI and IJ intervals of the normal ballistocardiogram. The results indicate that the acceleration (A), velocity (V), and displacement (D) of the ballistocardiogram in the HI and IJ phases may be expressed by a set of equations which, when evaluated numerically, give theoretical acceleration, velocity, and displacement curves. The theoretical A, V, and D curves corresponded closely to those observed on the normal ballistocardiogram record during the HJ interval.
动量守恒原理以及心室射血期间升主动脉中血液加速度近似恒定这一观察结果被用于对正常心冲击图的HI和IJ间期进行新的解释。结果表明，心冲击图在HI和IJ阶段的加速度（A）、速度（V）和位移（D）可以用一组方程来表示，当进行数值评估时，这些方程会给出理论加速度、速度和位移曲线。理论A、V和D曲线与在HJ间期正常心冲击图记录上观察到的曲线密切对应。
