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Cardiomyopathy responsive to gluten withdrawal in a patient with coeliac disease. A 57-year-old man with iron deficiency anaemia developed general malaise, exertional dyspnoea and features of cardiac failure out of proportion to his anaemia (haemoglobin 120 g/L). Investigations showed a severely dilated left ventricle with an ejection fraction of 15%, due to dilated cardiomyopathy. He was treated with high-dose diuretics, ACE inhibitors and β-blocker therapy. Subsequent investigation into his iron deficiency anaemia revealed a new diagnosis of coeliac disease. After starting a gluten-free diet, his cardiac function improved markedly, with ejection fraction reaching 70%, allowing his cardiac medications to be withdrawn. This case suggests a link between coeliac disease and cardiomyopathy.