高血压性心脏病二尖瓣频谱改变表现为（）。
A.二尖瓣口舒张期EF斜率减慢，A/E>1
B.二尖瓣口舒张期EF斜率增快，A/E<1
C.二尖瓣口舒张期EF斜率正常，A/E>1
D.二尖瓣口舒张期EF斜率正常，A/E<1
E.二尖瓣口舒张期EF斜率增快，A/E>1
参考答案：A
解析：高血压性心脏病二尖瓣前叶舒张期EF斜率减慢。频谱多普勒：舒张期二尖瓣血流频谱A/E>1。
从方框中选择恰当的词或短语并用其正确的形式填空。
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