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A and B, representative tracings from WT and R176Q/+ mice are shown at baseline and after sympathetic challenge with no drug (A) and following administration of flecainide, metoprolol and KN‐93 (B). C, summary of data without (left) and following (right) pre‐treatment with flecainide, metoprolol and KN‐93, which suppressed VT in all R176Q/+ mice (*P = 0.015).
