【名词&注释】
扩张型心肌病(dilated cardiomyopathy)、室间隔(interventricular septum)、限制性心肌病(restrictive cardiomyopathy)、肺动脉瓣关闭不全(pulmonary incompetence)、肺动脉内径(pulmonary artery internal dimension)
[单选题]该病例最有可能诊断()
A. A.肺动脉内径(pulmonary artery internal dimension)增宽
B. B.动脉导管未闭
C. C.肺动脉瓣狭窄
D. D.肺动脉瓣关闭不全
E. E.右室流出道狭窄