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应用二维超声心动图和脉冲、彩色多普勒超声对86例正常胎儿心脏进行了解剖结构及血液动力学的检测。其检测成功率为:房室内径为91%(78/86),主动脉内径为93%(80/86),肺动脉内径为92%(79/86),二、三尖瓣环内径为86%(74/86)。主动脉血流为98%(84/86),肺动脉血流为91%(78/86),二、三尖瓣口血流为86%(74/86)。根据所测之数值分析,证实了胎儿期右心发育优势的理论,提示了心输出量的改变符合胎儿生长发育的需要,LACT/LVET 和 RACT/RVET 值的变化说明了体循环和肺循环阻力随着胎龄的增加而逐渐降低。
The anatomical structure and hemodynamics of 86 normal fetal heart were detected by two-dimensional echocardiography and pulse and color Doppler ultrasound. The detection success rate was as follows: atrial diameter was 91% (78/86), aortic diameter was 93% (80/86), pulmonary artery diameter was 92% (79/86), two, tricuspid annulus diameter of 86 % (74/86). The aortic flow was 98% (84/86), pulmonary artery flow was 91% (78/86), and the tricuspid valve orifice flow was 86% (74/86). Based on the measured values, the theory of fetal right-heart development superiority was confirmed, suggesting that cardiac output changes in line with the needs of fetal growth and development. Changes in LACT / LVET and RACT / RVET values indicate that the systemic and pulmonary resistances vary with Gestational age increased and gradually decreased.