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. 2010 Nov 19;300(2):H605–H616. doi: 10.1152/ajpheart.00824.2010

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Fig. 7. — A–D: restitution curves, plotting APD against the preceding DI, from 7 regions in WT (A) and Scn5a+/− (C) hearts, and in RV1 before drug and after flecainide or quinidine in WT (B) and Scn5a+/− (D) hearts. The graphs are fitted with exponential functions, and from them the DIs at which the gradients equal unity (the DI_crit) have been calculated and are shown by the vertical lines. The results are shown graphically in the 7 regions of the heart (E) and in RV1 before and after flecainide or quinidine (F).