An atrial sound is not heard in this condition because mitral valve narrowing prevents sudden emptying of the left atrium. 心房音此时不能听到,因为二尖瓣狭窄阻止左心房突然排空。
Analysis of the effects by percutaneous mitral balloon valvutoplasty in rheumatic mitral stenosis.PBMV has the advantages of lower cost,shorter hospitalization. 本文分析经皮球囊二尖瓣成形术治疗风湿性二尖瓣狭窄的疗效。