二维超声心动图与声学造影诊断法乐氏四联症

本文报道应用二维超声心动图、声学造影诊断法乐氏四联症100例,均经手术治疗。术前超声诊断符合率95％。超声对室缺、右室肥厚及右室流出道狭窄的检出率100％;检出主动脉骑跨97％;肺动脉瓣显示率97.5％。右心声学造影93％显示收缩期有中等量或大量造影剂由右室进入主动脉,肺动脉内造影剂的有无及多少,对鉴别肺动脉闭锁及判断肺动脉狭窄程度很有帮助。本文还讨论了影响超声心动图正确诊断法乐氏四联症的因素。

TWO-DIMENSIONAL AND CONTRACT ECHOCARDIOGRAPHY IN THE DIAGNOSIS OF TETRALOGY OF FALLOT

One hundred cases of tetralogy of Fallot, confirmed by surgery, had been studied by two-dimensional echocardiography (2-DE). The preoperative diagnostic accuracy of the 2-DE was found to be 95%. All of VSDs, right ventricular hypertrophies and narrowings of the right ventricular "outflow tracts were demonstrated by the 2-DE. 97% of the over-riding aorta and 97.5% of the deformities of pul-monic valves were visualized. Contrast echocardiography demonstrated that moderate to massive amounts of contrast media were shunted from the right ventricle to the aorta during systole in 93% of the cases while the absence of contrast medium in. or the amount of such medium gaining access to the main pulmonary artery could be clearly visualized. Thus the contrast study was quite helpful in identifying pulmonary atresia and in quantitating the degree of pulmonary stenosis. Factors affecting the correct diagnosis of tetralogy of Fallot were then discussed.