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ABBREVIATION for Social Democratic Party 社会民主党
The SD of mitral and tricuspid annuli were more lower than control group (P<0.01), and E velocity of mitral flow is higher (P<0.01) .
患者较正常对照组心脏二尖瓣环、三尖瓣环下移距离显著减小（P<0.01），二尖瓣E波最大流速显著增大（P<0.01）；
The SD of tricuspid annuli began to increase 3 month after operation (P<0.05).
术后3月三尖瓣环下移距离有所增大（P<0.05）；
SD of all groups was not obvious different in L4-S1 segments, TD of every groups above 15 years old was larger than that of two groups below(P<0.05);
各年龄组椎管矢径无明显差异； L4-S1节段15岁以上各组椎管横径大于以下两组（P<0.05）；
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