Predominant RV endomyocardial fibrosis masking rheumatic mitral stenosis.

We report a 30 year female with rheumatic mitral stenosis, presenting with progressive right heart failure without overt leftheart symptoms. Rapid progression to severe right heart failure with moderate pericardial effusion prompted the diagnosis of associated restrictive cardiomyopathy. A MRI scan of the heart revealed diffuse subendocardial scarring of LV and RV explaining patient's rapid downhill course.