Objective:To evaluate the accuracy of the diagnosis of persistent truncus arteriosus(PTA) by Doppler echocardiography,analyze the misdiagnosed and improve the echocardiographic diagnosis.

• 目的:探讨多普勒超声心动图对永存动脉干及其分型的诊断价值,分析误诊原因,提高其诊断的准确率。