S2和开瓣音间隔时间跟二尖瓣狭窄程度有关，狭窄越严重，S2-OS间期就越短。
The interval between S2 and the OS is related to the severity of mitral stenosis. The more severe the stenosis, the shorter the S2-OS interval.
S2和开瓣音间隔时间跟二尖瓣狭窄程度有关，狭窄越严重，S2-OS间期就越短。
The interval between S2 and the OS is related to the severity of mitral stenosis. The more severe the stenosis, the shorter the S2-OS interval.
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