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Effects of lidocaine (100 µM) and flecainide (10 µM) on QRS duration and intraventricular conduction time (CT) in Langendorff-perfused hearts without (upper part of the figure) and with ischaemia and reperfusion (lower part of the figure).*P < 0.05, significantly different from effects of solvent. The figure shows that lidocaine has much weaker effects on QRS duration and CT than flecainide. Data are mean ± SEM.
