Objective To explore the diagnostic value of ultrasound detection of left atrial posterior spatial distance for total anomalous pulmonary venous connection(TAPVC)in fetuses.Methods With the selection of 362 pregnant women who underwent mid-term fetal structural screening in hospitals from March 2020 to August 2021 as the research subjects,the left atrial posterior spatial distance was measured using a color Doppler ultrasound diagnostic instrument at the end systolic phase of the standard four chamber view.With the use of the results of postpartum fetal echocardiography or the evaluation results of fetal autopsy after induced labor as the gold standard,the results of cardiac ultrasound examination,fetal left atrial posterior spatial distance,and characteristics of cardiac ultrasound examination for fetal TAPVC were statistically analyzed,and the correlations of left atrial posterior spatial distance with gestational age and Apgar score at birth were analyzed.Results Among 362 pregnant women,7 cases were diagnosed with supracardiac fetal TAPVC by ultrasound,and 4 cases were diagnosed with intracardiac fetal TAPVC;The left atrial posterior spatial distance of TAPVC fetuses was greater than that of normal fetuses(P<0.05);The left atrial posterior spatial distance was negatively correlated with gestational age and newborn Apgar score(r=-0.658,-0.747,P<0.05).Conclusion The measurement of left atrial posterior spatial distance under ultrasound can be used for the diagnosis of fetal TAPVC,and its results are negatively correlated with gestational age and newborn Apgar score.
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