Action potential characteristics and ICa,L in control, son and father iPSC-CMs. (A) Representative APs of control, son and father iPSC-CMs. (B–H) Summary of AP parameters in control and LMNA-mutated iPSC-CMs: (B) APA, (C) AP peak, (D) dV/dtmax, (E) APD20, (F) APD50, (G) APD90 and (H) MDP. Control (FSE-5 m and 24.5), n = 30; son, n = 14; father, n = 27. One-way ANOVA was performed followed by Holm–Sidak post hoc analysis. * p < 0.05. (I) Representative recordings of the ICa,L in control, son and father iPSC-CMs. (J) ICa,L current–voltage (I–V) relations in control and LMNA-mutated iPSC-CMs (n = 13 control (FSE-5 m); n = 8 son; n = 13 father). Two-way ANOVA was performed followed by Holm–Sidak post hoc analysis. * p < 0.05 father vs. control; # p <0.05 son vs. control.