A 26-year-old male with history of generalized anxiety disorder presented to the emergency department with palpitations. He was diagnosed with supraventricular tachycardia; administration of adenosine restored normal sinus rhythm. Subsequent cardiovascular examinations and serial electrocardiograms (ECG) were unremarkable. Transthoracic echocardiogram identified a large, mid-septal mass that appeared to extend into both ventricular cavities (Panels A and B). The mass demonstrated perflutren uptake, suggesting hypervascularity (Panel B). No other significant abnormalities were identified.

中文翻译：

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诊断难题：多模态成像在评估罕见心内肿块中的作用

一名有广泛性焦虑症病史的 26 岁男性因心悸而到急诊科就诊。他被诊断为室上性心动过速；腺苷给药恢复了正常的窦性心律。随后的心血管检查和连续心电图（ECG）均无异常。经胸超声心动图发现一个大的中间隔肿块似乎延伸到两个心室腔（图A 和 B ）。肿块显示 perflutren 摄取，表明血管过多（图B）。未发现其他显着异常。