心室中隔欠損（VSD）には様々な分類がある．今回，第21回教育セミナーにて依頼を受け，説明を行った国際小児・先天性心疾患命名学会（ISNPCHD）によるVSDの分類法について解説する．この分類はVSDを心室中隔内の位置によるアプローチ（Geographic approach）および欠損孔の境界・周囲組織との関係によるアプローチ（Borders approach）によってVSDを分類する方法であり，国際疾病分類第11版（ICD-11）に組み込まれることとなった．Geographic approachはcentral, inlet, trabecular muscular, outletに分類され，Borders approachはperimembranous, muscular, juxta-arterialに分類される．それによりVSDの位置および周辺組織の解剖学的特徴を深く理解することが可能となる．
Various classification systems for ventricular septal defect (VSD) have been proposed. In this report, we provide an overview of the classification system for VSD proposed by the International Society for the Nomenclature of Pediatric and Congenital Heart Disease (ISNPCHD), which was presented upon request at the 21st Educational Seminar. This classification is based on two complementary approaches: The Geographic approach (central, inlet, trabecular muscular, or outlet), which categorizes VSDs according to their anatomical location within the ventricular septum, and the Borders approach (perimembranous, muscular, or juxta-arterial), which classifies them based on the relationship between the defect margins and the surrounding anatomical structures. This system has been incorporated into the 11th revision of the International Classification of Diseases (ICD-11). The combination of geographic and border approaches enables a more detailed anatomical characterization of VSDs.
Key words: ventricular septal defects; classification of ventricular septal defects; surgical technique
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