Intracardiac thrombosis, phospholipid antibodies, and two-chambered right ventricle.

A 34 year old woman with a history of five spontaneous abortions and a systemic lupus-like illness underwent cardiotomy for resection of a calcified right ventricular thrombus. At operation an anomalous right ventricular muscle bundle was discovered under the calcified thrombus. Clinical chemistry showed lupus anticoagulant activity and cardiolipin antibodies in the plasma.