有一室间隔缺损患儿，用连续多普勒测定其穿隔分流速度为4m/s，肺动脉前向血流速度为5m/s，肱动脉收缩压为96mmHg。该患儿的肺动脉收缩压大约为

A.12mmHg

B.22mmHg

C.32mmHg

D.42mmHg

E.＜22mmHg