单心房是一种罕见的先天性心脏病，系胚胎发育期房间隔的第1隔和第2隔均未发育所致。房间隔的痕迹也不存在，而室间隔完整，故又称为二室三腔心或单心房三腔心。单心房可单独存在，但常合并左上腔静脉和右位心，左位心或腹腔内脏转位畸形，特别常见二尖瓣前叶裂缺，甚至存在房室管畸形。
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目的总结单心房的外科治疗经验。
Objective To summarize the experience of surgical treatment of single atrium.
在心尖四腔心切面除显示单心室外，还能显示共同房室瓣、单心房等合并畸形。
In apical four chamber view, not only single ventricle could be displayed, but the common atrio-ventricular valve, mono-atiriatum and other anomality could be displayed also.
手术证实18例均为心内膜垫缺损，其中部分型11例（ 1例并法鲁四联征） ，完全型2例，单心房腔型5例。
Surgical results confirmed ECD in all 18 cases, of which 11 cases were of partial type, 2 were of whole type and 5 were of single atrium type.
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