目的探讨鼾症对老年退行性心脏瓣膜病（DCVD）的影响和对心脏瓣膜结构和功能损害的特征。
Objective To explore the effects of rhonchus on senile degenerated cardiac valvular disease (DCVD)and impairment features of valvular structure and function .
患此病的乳猪中所见的第一批症状是喷嚏和鼻鼾。
The first signs noted in baby pigs affected with this condition are sneering and sniffing.
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