速度向量成像技术的概述一、背景定量评估胎儿心功能以明确其生理、病理情况一直是个难点。在定量评估成人心功能方面,通过缩短分数、射血分数、射血量等参数计算已可基本实现,但这些参数都有明显的前负荷和后负荷依赖性,重复检查的结果变化较大。同时,胎儿心脏运动存在心率过快,易受胎动、胎位、母体的因 Overview of velocity vector imaging technology Background quantitative assessment of fetal heart function to clarify its physiological and pathological conditions has been a difficult task. In the quantitative assessment of adult cardiac function, by shortening the fraction, ejection fraction, ejection and other parameters of the calculation has been basically achieved, but these parameters have obvious pre-load and post-load dependence, repeated test results vary greatly. At the same time, there is fetal heart rate too fast heart rate, susceptible to fetal movement, fetal position, maternal cause