【名词&注释】
肺动脉收缩压(pulmonary artery systolic pressure)、肺动脉瓣狭窄(pulmonary valve stenosis)、右心室(right ventricle)、肺动脉狭窄(pulmonary stenosis)、右室收缩压、肺动脉瓣关闭不全(pulmonary incompetence)
[单选题]以下哪种情况,右室收缩压明显高于肺动脉收缩压
A. 肺动脉瓣开放正常
B. 肺动脉瓣狭窄
C. 肺动脉瓣关闭不全(pulmonary incompetence)
D. 右心室收缩增强
E. 动脉导管未闭