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Effects of TTX on enhanced myocyte shortening and [Ca2+]i transients induced by ATX. (A) Representative recordings of cell shortening (upper) and [Ca2+]i transients (lower) in the absence (Control) and presence of 3 nmol/L ATX before and after exposure to TTX 2 μmol/L. (B) Summary data for representative parameters of cell shortening and [Ca2+]i transients. The data are expressed as the mean±SD (n=7). cP<0.01 vs Control; fP<0.01 vs ATX group.
