Abstract

Introduction: Fetal unguarded tricuspid valve orifice (UTVO) is characterized by a complete or partial absence of the tricuspid valvular tissue or sub-valvular apparatus and only case reports are available at present. We report a UTVO diagnosed by fetal autopsy. Case report: An 18-week fetus was diagnosed by prenatal ultrasound with tricuspid dysplasia with ‘to-and-fro’ flow across the right-sided heart. Fetal autopsy showed partial agenesis of tricuspid valve instead of valvular dysplasia. This supported a diagnosis of UTVO. Conclusion: Fetal autopsy can differentiate UTVO form other valve abnormalities. The ‘to-and-fro’ flow pattern across the right atrioventricular orifice could be used to differentiate UTVO from other valve dysplasias on echocardiography.

摘要

简介：胎儿无保护三尖瓣口（UTVO）的特点是三尖瓣组织或瓣下器具完全或部分缺失，目前只有病例报告。我们报告了通过胎儿尸检诊断出的 UTVO。病例报告：一名 18 周的胎儿经产前超声诊断为三尖瓣发育不良，右心有“来回”血流。胎儿尸检显示三尖瓣部分发育不全，而不是瓣膜发育不良。这支持 UTVO 的诊断。结论：胎儿尸检可以区分 UTVO 与其他瓣膜异常。右房室口的“来回”流动模式可用于在超声心动图上将 UTVO 与其他瓣膜发育不良区分开来。