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1·Methods:Evoked release of catecholamine from cardiac sympathetic nerve in rabbit heart in vivo was recorded by electrochemical amperometry using gold fiber micro-electrodes.

方法：以金纤维制成浮动式电极，采用微电极恒压安培法记录在体兔心脏表面交感神经末梢儿茶酚胺分泌。