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Restrictive cardiomyopathy is an entity that can be mistaken for several mimicking conditions, including hypertrophic cardiomyopathy. These patients present with heart failure, which is essentially due to left ventricular diastolic dysfunction, with preserved left ventricular ejection fraction. Conditions associated with hypereosinophilia and diastolic dysfunction with restrictive heart disease are called Loeffler's syndrome. There is also associated left ventricular thrombus formation and fibrosis. Here, we present a case of restrictive cardiomyopathy associated with rheumatoid arthritis presenting clinically with heart failure. The clues pointing toward hypereosinophilic endocarditis were a high absolute eosinophil count and a large left ventricular thrombus. We discuss the multimodality imaging findings to differentiate the different types of restrictive cardiomyopathy.