An electrocardiographic sign of tumor invasion of the myocardium.

Lung cancer is one of the most common neoplasms associated with cardiac metastasis, and the pericardium is often affected. However, isolated myocardial involvement in these patients is very uncommon. Most tumor invasions into the heart are nonspecific and clinically silent.

Large Mass in Left Atrium by Transesophageal Echocardiography: An Unusual Case of Cardiac Angiosarcoma Mimicking a Cystic Mass.

Primary cardiac tumors are extremely rare. Among them, malignant tumors constitute approximately 15% of primary cardiac tumors. Angiosarcomas are the most frequent.