Cardiac amyloidosis is a rare cause of cardiomyopathy, reported exclusively in adults. We report the first known case presenting in childhood. A 12-year-old boy presented with syncope and diagnosed with ventricular non-compaction by echocardiography. Eventual genetic testing confirmed a TTR gene mutation associated with hereditary transthyretin amyloidosis.

中文翻译：

---

患有晕厥的儿童的心脏淀粉样变性：首例报告病例和诊断困境。

心脏淀粉样变性是心肌病的一种罕见病因，仅在成人中报道。我们报告了第一个在儿童时期出现的已知病例。一名 12 岁男孩出现晕厥，经超声心动图诊断为心室致密化不全。最终的基因检测证实了与遗传性转甲状腺素蛋白淀粉样变性相关的 TTR 基因突变。