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Approximately a fifth of cardiovascular deaths in pregnancy are attributable to cardiomyopathy [1]. Hypertrophic cardiomyopathy (HCM) is often well tolerated with the appropriate specialist care and should not represent a contraindication to pregnancy. Preterm birth, however, occurs in a quarter of patients with HCM [12]. In dilating forms of cardiomyopathy (DCM), pregnancy can result in significant deterioration of LV function, and prepregnancy functional class III or IV and LV ejection fraction <40% are predictors of adverse outcome [13]. Prior to pregnancy, these women need careful counseling regarding the potentially irreversible deterioration of LV function and the risk of maternal and fetal death. All women with cardiomyopathy are at risk of arrhythmia, which may sometimes be poorly tolerated (e.g. atrial fibrillation in patients with HCM, or ventricular tachyarrhythmia).