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Heart failure in pregnancy is rare, but usually ascribed to peripartum cardiomyopathy in the absence of other possible diagnoses. However, heart failure can develop solely due to a tachycardia, so-called ‘tachycardia-induced cardiomyopathy’. The incidence of tachycardia-induced cardiomyopathy in pregnancy is unknown, but it is a treatable and potentially reversible cause of heart failure. Clinically, tachycardia-induced cardiomyopathy during pregnancy might present in a similar manner, but its management has to be individualized according to the arrhythmic substrate and usually involve multidisciplinary input from specialists in obstetrics, cardiac electrophysiology and heart failure.