[求助]

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<P>请问能告诉我，使那些原因导致先心病的？想以下的胎儿心脏报告，是二十二周时检查的。请问该如何？</P>
" E/ ]5 x7 J: L% F+ X& q6 J& i1 a<P>胎儿超声心动图报告单</P>
. F- d; w3 Y& ]' _: F<P>分析：</P>
8 d- B: T) K0 T<P><FONT face="Times New Roman">1．  </FONT>可探及切面：四腔心、五腔心、大血管短轴、主动脉弓长轴</P>
8 {7 W2 r/ L% k2 R<P><FONT face="Times New Roman">2．  </FONT>右房增大，部分为房化右室，右室小</P>
- i* q6 {" `, l( j; X% g3 }<P><FONT face="Times New Roman">3．  </FONT>三尖瓣后瓣、各瓣下移，距<FONT face="Times New Roman">MV</FONT>前瓣附着点<FONT face="Times New Roman">5mm,</FONT>三尖瓣<FONT face="Times New Roman">-</FONT>右房侧探及中量返流，<FONT face="Times New Roman">A:0.54CM</FONT>平方。</P>
; c8 \! s- N% i<P><FONT face="Times New Roman">4．  PFO3.7mm, IVS</FONT>完整，两大血管出处及走行正常</P>
) J5 ]: F' d7 l/ k& _1 h<P><FONT face="Times New Roman">5．  </FONT>胎心率<FONT face="Times New Roman">140</FONT>次<FONT face="Times New Roman">/</FONT>分，<FONT face="Times New Roman"> </FONT>节律整齐</P>
) J) J5 }: U( k7 C<P><FONT face="Times New Roman">6．  </FONT>脐带<FONT face="Times New Roman">S/D2.3, RI0.57, </FONT>颈部未见脐带压迹及绕颈脐带血流</P>
0 H! D5 V+ A. k' B<P><FONT face="Times New Roman">7．  C/T: 0.37</FONT></P>
<P><FONT face="Times New Roman">8．  </FONT>胎心心包、胸腔、腹腔均见弧形液暗区，深度分别为<FONT face="Times New Roman">4.8mm, 6.1mm, 8.5mm, </FONT>并可见胎儿皮下水肿征象。</P>
5 _. l( y3 T: N# G, F<P><FONT face="Times New Roman">
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<p>
<P>超声提示：</P>
<P><FONT face="Times New Roman">1．  </FONT>胎儿三尖瓣下移畸形，三尖瓣关闭不全（中度）</P>
<P><FONT face="Times New Roman">2．  </FONT>胎儿水肿</P>
<P><FONT face="Times New Roman">3．  </FONT>胎儿循环阻力正常</P>
<P><FONT face="Times New Roman">4．  </FONT>未见脐带绕颈</P>