CAV3 and persistent truncus arteriosus: Calculation of t‐tubular ICa showed that absolute ICa is significantly increased so that ICa density is maintained in the t‐tubules of Cav‐3 OE myocytes following TAC (Figure 4c,d), in contrast to the lack of change of absolute ICa and thus decrease in t‐tubular ICa density observed in WT myocytes following TAC (Figure 4c,d).