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. 2016 Oct 8;103(5):347–354. doi: 10.1136/heartjnl-2016-309730

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Regional action potential duration and gradients in the RV. (A) Epicardial APD20 and APD80 were prolonged in the anterior RV of rTOF pigs compared with Sham (see representative traces). (B) Endocardial APD20 but not APD80 was shorter in the anterior rTOF RV than in Sham (see representative traces). (C) RV transmural APD80 gradient (APD80_ENDO–EPI) was reversed and significantly different from Sham in the anterior region while remaining unchanged in rTOF posterior region. (D) RV anteroposterior APD80 gradient (APD80_POST–ANT) was reversed in rTOF epicardium and significantly different from Sham epicardial and rTOF endocardial gradients. Data are means±SD. *p<0.05, **p<0.01, Sham N=4, rTOF N=5–6. APD, action potential duration; rTOF, repaired tetralogy of Fallot; RV, right ventricle.