An asymptomatic 61-year-old man was admitted due to new-onset atrial fibrillation incidentally detected upon mandatory occupational health assessment. A transthoracic echocardiogram (TTE) revealed an enlarged right atrium with volume 230 mL (Simpson’s uniplane method) and area 49 cm²; in subcostal view, the right atrium was shown to contain a membrane-like structure, longitudinally arranged, appearing to separate the right atrium into two compartments (Panel A). Tricuspid valve was structurally normal with no apical displacement (Supplementary data online, Video S1); estimated systolic pulmonary pressure was normal (32 mmHg). Left ventricular ejection fraction was 58%, TAPSE 1.5 cm. Bubble study performed during transoesophageal echocardiography (TOE)...

中文翻译：

---

右房憩室的晚期出现：手术干预可能不是必须的。

由于强制性职业健康评估中偶然发现新发房颤，因此收治了无症状的61岁男性。经胸超声心动图（TTE）显示右心房增大，容积为230 mL（辛普森单翼法），面积为49 cm ²。在肋下视图中，右心房显示为纵向排列的膜状结构，似乎将右心房分为两个隔室（图A）。三尖瓣结构正常，无根尖移位（在线补充数据，视频S1）; 估计收缩期肺动脉压正常（32 mmHg）。左心室射血分数为58％，TAPSE为1.5 cm。经食道超声心动图（TOE）期间进行的气泡研究...