Transesophageal echocardiographic diagnosis of right atrial thrombi associated with the antiphospholipid syndrome.

Thromboembolic disorders are a hallmark of the antiphospholipid antibody syndrome. We describe a patient with IgM antiphospholipid antibodies associated with pulmonary emboli and in situ thrombosis within an otherwise normal right atrium. Echocardiography, particularly the transesophageal study, proved invaluable in providing a diagnosis and guiding our patient's evaluation and treatment.