Restrictive cardiomyopathy in an infant with massive biatrial enlargement and normal ventricular size and pump function.

Restrictive cardiomyopathy in an infant with massive biatrial enlargement and normal ventricular size has been reported only once previously 3]. We now present a 13-month-old patient with severe and progressive congestive heart failure who demonstrated normal ventricular cavity size with biatrial enlargement. Ejection fraction and echocardiographic ventricular function studies were normal.