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组织多普勒显像是一项新的超声技术,可以直接测定心肌收缩和舒张速度。以此方法研究心肌运动速度可能用于评估心室收缩和舒张功能。虽然已有学者报告正常胎儿经房室瓣血流速度的特点,但是尚无有关组织多普勒显像检查心肌运动速度的资料。 Kenji Harada等进行一项研究,评价正常胎儿心肌速度的特点和随胎龄的变化,及测定心肌舒张期速度与传统多普勒检查方法所检测的房室血液流入速度之间的关系。 作者们测定30例胎龄为19～38周,平均为(26.3±6.0)周的正常胎儿左室后壁、右室前壁、室间隔延长轴的运动速度。全部胎儿舒张早期和心房收缩时心肌峰值速度(分别简称为EW和AW)均有记录。左室EW、AW和E/Aw分别为(5.4±1.7)cm/s、(7.0±1.4)cm/s和0.77±0.19,右室
Tissue Doppler imaging is a new ultrasound technique that directly measures myocardial contractile and diastolic velocities. Using this method to study myocardial velocity may be used to assess ventricular systolic and diastolic function. Although some scholars have reported the characteristics of normal fetal blood flow through the atrioventricular valve, there is no information on the tissue Doppler imaging to check the speed of myocardial movement. A study by Kenji Harada et al. Evaluated the characteristics of normal fetal myocardial velocity and changes with gestational age and the relationship between myocardial diastolic velocity and the velocity of atrioventricular blood flow measured by conventional Doppler imaging. The authors measured the velocity of 30 cases of normal fetal left ventricular posterior wall, right ventricular anterior wall, and ventricular septal extension axis in 30 fetuses of gestational age from 19 to 38 weeks with an average of (26.3 ± 6.0) weeks. All fetal pre-diastolic and atrial contraction peak myocardial velocity (respectively referred to as EW and AW) are recorded. The left ventricular EW, AW and E / Aw were (5.4 ± 1.7) cm / s, (7.0 ± 1.4) cm / s and 0.77 ± 0.19, respectively