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Bar graph showing peak activity of nine ischaemically sensitive cardiac afferents before (□) and after (▪) left atrial injection of 5-HT (20-40 μg kg−1), 5-CT (100 μg kg−1), α-M-5-HT (100 μg kg−1), PBG (100 μg kg−1) or SC53116 (100 μg kg−1). Data are presented as means ± s.e.m. * P < 0.05vs. control.
