[单选题]

WHO推荐的EF正常值是()

A.LⅦF>45%,RVEF>45%

B.LVEF>50%,RVEF>40%

C.LVEF>55%,RVEF>55%

D.LVEF>40%,RVEF>50%

E.LVEF>50%,RVEF>50%

参考答案与解析: