PKP2 and persistent truncus arteriosus: Eight weeks after TAC surgery, in both groups hypertrophy was observed (HW/BW WT-Sham: 5.95 ± 0.26 mg/g; WT-TAC: 8.60 ± 1.99 mg/g, p ≤ 0.05; PKP2-Hz Sham: 5.84 ± 0.92 mg/g; and 8.44 ± 1.85 mg/g; p ≤ 0.01), fractional shortening was reduced (WT-Sham: 48.54% ± 1.2%; WT-TAC: 37.43% ± 3.0%, p ≤ 0.0001; PKP2-Hz Sham: 47.3% ± 2.9%; and PKP2-Hz TAC 37.34% ± 5.5%, p ≤ 0.001) and QRS duration prolonged (WT-Sham: 9.18 ± 0.5 ms; WT-TAC: 11.01 ± 0.9 ms, p ≤ 0.05; PKP2-Hz Sham: 8.69 ± 0.4 ms, and PKP2-Hz TAC: 11.51 ± 0.6 ms, p ≤ 0.05).