Abstract
We present the case of a woman with a 2-month history of exertional dyspnoea and fatigue in which echocardiography revealed a cavity-obliterating right ventricular mass. Further imaging evaluation using cardiac magnetic resonance showed a thrombotic mass as well as diffuse myocardial oedema and endomyocardial fibrosis (EMF) that involved both ventricles. In the absence of any other cause (including peripheral eosinophilia), the diagnosis of idiopathic EMF was established. This case highlights this uncommon disease in non-tropical areas.