[A case report of complete heart block by metastatic cardiac involvement from lung cancer]

A 77-year-old man who developed Adams-Stokes syndrome due to metastatic squamous cell carcinoma of the His-bundle was reported. There was a small primary lesion in the left upper lobe (S5) of the lung, and it widely invaded to the chest wall and metastasized to the spleen and the ventricular septum of the heart. The clinical diagnosis of the metastatic cardiac involvement is often elusive. But some literatures suggested that the careful observation of serial ECGs and UCGs were very useful not only to diagnose the metastasis but to indicate the invasive style to the heart.