The histological and immunohistochemical methods were employed to examine the peculiarities of histological structure of pulmonary veins and left atrium of the heart in norm and in various types of total anomalous drainage of pulmonary veins. In contrast to normal pulmonary vein covered with e xternal multiple muscle layers (myocardial sleeve), such sleeve is absent in veins that have no connection with the left atrium irrespective of the type of the defect. In patients with total anomalous pulmonary venous drainage, the structure of left atrium was heterogeneous featuring either the presence or absence of inner angiomural lining in this atrium. The structural peculiarities are important for insight into etiology of the development of postoperative pulmonary venous obstruction in patients with total anomalous pulmonary venous drainage.

中文翻译：

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肺静脉总引流异常患者肺静脉组织学结构特点与术后肺静脉阻塞形成的相关性

采用组织学和免疫组化方法检查肺静脉和左心房在正常和各种类型的肺静脉完全异常引流中的组织学结构特点。与覆盖有外部多个肌肉层（心肌袖）的正常肺静脉相反，这种袖子在与左心房没有联系的静脉中不存在，无论缺损类型如何。在完全异常肺静脉引流的患者中，左心房的结构是异质的，其特征是该心房中存在或不存在血管壁内衬。结构特征对于了解完全异常肺静脉引流患者术后肺静脉阻塞发展的病因很重要。