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A, histogram showing group data of eight cardiac afferents yielding consistent responses during repeated ischaemia. B, group data of nine cardiac afferents responsive to ischaemia before and after administration of oxypurinol (10 mg kg−1, i.v.). * Responses during control and ischaemia were significantly different (P < 0.05). # Responses during ischaemia before and after oxypurinol likewise were significantly different (P < 0.05).
