To compare prenatal echocardiography with postnatal cardiovascular casting for detection of fetal cardiovascular malformations, and to discuss the causes of prenatal misdiagnosis and missed diagnosis.

中文翻译：

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产前超声心动图结合产后心血管铸造术对胎儿复杂心脏畸形的误诊和漏诊的描述。

比较产前超声心动图与产后心血管铸型术对胎儿心血管畸形的检测，并探讨产前误诊和漏诊的原因。