【名词&注释】
左心室(left ventricular)、肺动脉高压(pulmonary hypertension)、室间隔缺损(ventricular septal defect)、静脉注射丙种球蛋白(intravenous immunoglobulin)、右心室压(right atrial pressure)、静脉注射治疗(treated by intravenous injection)
[单选题]室间隔缺损伴明显肺动脉高压时,有下列表现.但除外()
A. A.左心室显著增大
B. B.原有心脏的杂音显著增强
C. C.肺动脉瓣区第二音明显亢进
D. D.X线显示肺动脉段明显突出
E. E.右心室压(right atrial pressure)力明显增高