ObjectiveTo explore the diagnostic value of ultrasound for supraventricular total and partial pulmonaryvenous connection（TAPVC

PAPVC）

and analyze the causes of misdiagnosis and missed diagnosis.MethodsThe characteristicsof color Doppler ultrasonography on 204 cases with TAPVC and 98 cases with PAPVC were retrospectively analyzed

theaccuracy of diagnosis and the combined malformations were analyzed by compared with CT or surgery.ResultsThe accuracy ofultrasound diagnosis of 204 TAPVC cases was 100%. 193 cases were transferred to the brachiocephalic vein

11 cases weredirectly open to the right superior vena cava.202 patients showed complete pulmonary veins

only 2 patients showed 3 pulmonaryveins.Combined malformations included 165 cases（80.9%）of atrial septal defect

34 cases（16.7%）of patent foramen ovale.Among 98 cases of PAPVC

the accuracy of ultrasound diagnosis was 75.5%（74/98）. 60 cases were introduced into thebrachiocephalic vein

37 cases were directly transferred into the right superior vena cava

and 1 case was transferred into thesuperior vena cava via azymatic vein.There were 71 cases of single

21 cases of two

and 6 cases of three.Combined malformationsincluded 67 cases（68.4%）of atrial septal defect

15 cases（15.3%）of patent foramen ovale.11 cases were misdiagnosed and13 cases were missed diagnosed

including 9 cases of missed judgment of drainage count and 4 cases of missed diagnosisof diagnosis.ConclusionThe accuracy of ultrasound in the diagnosis of PAPVC is weaker than that of TAPVC. Bycomprehensively scanning abnormal blood vessel contours and enhancing the differential diagnosis of artifacts and normal orabnormal intracardiac structures

it can help to reduce the rate of missed diagnosis.