【名词&注释】
门静脉(portal vein)、肺动脉(pulmonary artery)、未破裂型宫外孕(unruptured ectopic pregnancy)、乙状结肠(sigmoid)、超声诊断仪(ultrasonic diagnostic equipment)、右心房(right atrium)、横结肠(transverse colon)、肺静脉异位(anomalous pulmonary venous)、肺静脉回流(pulmonary venous connection)
[单选题]心内型肺静脉异位(anomalous pulmonary venous)引流在超声上主要表现是
A. 肺静脉回流(pulmonary venous connection)到下腔静脉
B. 肺静脉回流(pulmonary venous connection)到上腔静脉
C. 肺静脉直接回流到主动脉
D. 肺静脉回流(pulmonary venous connection)到冠状窦
E. 肺静脉直接回流到肺动脉