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Visualization of Right Atrial Thrombus Associated with Constrictive Pericarditis by Indium-111 Oxine Platelet Imaging

Department of Radiology, and Department of Cardiology National Cardiovascular Center, Suita, Osaka, Japan

Correspondence: For reprints contact: Tsunehiko Nishimura, MD, Dept. of Radiology, National Cardiovascular Center, 5-7-1 Fujishirodai, Suita Osaka Japan 565.

ABSTRACT

A right atrial thrombus is not often seen and only a few reports of visualization have been described. We report a 44-yr-old man who had a large atrial thrombus associated with constrictive pericarditis. Two-dimensional echocardiography and computed tomography showed a large right atrial mass. Indium-111 oxine platelet deposition was demonstrated on the surface of thrombus by platelet imaging. Platelet imaging was useful for differential diagnosis from cardiac tumor, and as an indication for surgical treatment, since right atrial thrombus may have a high risk of pulmonary embolism or severe right heart failure.

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