Objective: To evaluate the echocardiographic effect before and after small balloon percutaneous balloon mitral valvuloplasty (PBMV) in patients with severe mitral stenosis (MS).
目的：探讨彩色多普勒超声心动图在重度二尖瓣狭窄(MS)行小球囊经皮二尖瓣球囊成形术(PBMV)前后的作用。
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。
Combined cardiac diseases included coronary heart disease (2 cases), rheumatic mitral stenosis (2 cases), and severe mitral insufficiency (3 cases), and severe tricuspid insufficiency (4 cases).
合并冠状动脉病变2例，风湿性二尖瓣狭窄2例，二尖瓣中重度关闭不全3例，三尖瓣重度反流4例。
Combined cardiac diseases included coronary heart disease (2 cases), rheumatic mitral stenosis (2 cases), and severe mitral insufficiency (3 cases), and severe tricuspid insufficiency (4 cases).
合并冠状动脉病变2例，风湿性二尖瓣狭窄2例，二尖瓣中重度关闭不全3例，三尖瓣重度反流4例。
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