CAV3 and hydrops fetalis: Interestingly, cardiac hypertrophy and heart failure (HF) are associated with decreased Cav‐3 expression (Bryant et al., 2018a), and myocytes from such hearts also show hypertrophy, t‐tubular disruption, decreased t‐tubular ICa density and impaired SR Ca2+ release (Bryant et al., 2015; Bryant et al., 2018a), suggesting that reduced Cav‐3 expression may play a role in the phenotypic changes observed in these conditions.