Levy B, Targett R C, Bardou A, McIlroy M B
Cardiovasc Res. 1985 Jul;19(7):383-93. doi: 10.1093/cvr/19.7.383.
We have developed digital, Apple II microcomputer-based methods for the numerical analysis of pulsed, range-gated, ultrasonic Doppler blood velocity signals. These methods were then used to analyse Doppler data recorded every 5 ms from the ascending aorta via the suprasternal notch in normal subjects ranging in age from 3 to 62 years. Normal values for peak velocity, the integral of velocity over the time of systole, and the rate of change of velocity in early ejection are reported. It was found that, after an initial step increase, the velocity of blood flow in early ejection increased in a linear manner in more than two thirds of the individual beats analysed. The time for which the linear acceleration in the aorta was constant (circa 50 ms) was unrelated to the age or size of the subject.
我们已开发出基于苹果II型微型计算机的数字方法，用于对脉冲式、距离选通的超声多普勒血流速度信号进行数值分析。然后，这些方法被用于分析年龄在3至62岁的正常受试者通过胸骨上切迹从升主动脉每5毫秒记录一次的多普勒数据。报告了峰值速度、收缩期速度积分以及射血早期速度变化率的正常值。结果发现，在最初的一步增加之后，在超过三分之二分析的单个搏动中，射血早期的血流速度呈线性增加。主动脉中线性加速度保持恒定的时间（约50毫秒）与受试者的年龄或体型无关。
