A 20-year-old woman with a recent episode of pulmonary embolism was found by echocardiographic examination to have a calcified apical right ventricular intracavitary mass. She had a history of cigarette smoking and had been taking oral contraceptive pills. At age 17 years, she had sustained substantial blunt chest injury during a motor vehicle accident. The intracardiac mass was resected and represented an old calcified mural thrombus. It is postulated that its development was related to cardiac trauma. These intracavitary masses have been referred to as cardiac calcified amorphous tumors and generally represent old organized and focally calcified mural thrombus. They should be distinguished from calcified benign or malignant neoplasms of the heart.