Congestive heart failure and endocardial fibroelastosis caused by chronic lymphocytic leukemia.

Endocardial fibroelastosis developed in the heart of a patient who had chronic lymphocytic leukemia. Leukemic infiltrates were found in the endocardial scar tissue, myocardium, coronary arteries, and other viscera. In view of the absence of any other known cause of endocardial fibroelastosis, it is postulated that endocardial fibroelastosis was caused by myocardial leukemic infiltration. This is the first reported case of endocardial fibroelastosis in a patient with chronic lymphocytic leukemia.