[The state of adrenergic and cholinergic fibers in the heart of rabbits subjected to sensitization and anaphylactic shock].

It was determined by neurohistochemical methods that after sensitization and anaphylactic shock the adrenergic and cholinergic nervous structures of the heart change. The lowered fluorescence intensity, alterations in density of the adrenergic nervous structures of the heart are observed following the fourth sensitizing injection of normal horse serum. These changes are more obvious on day 7 after anaphylactic shock. The changes in the structure of cholinergic nerve fibers were noted only on day 7 after anaphylactic shock. They manifested in lowered activity of histochemical reaction of nerve elements to acetylcholine in all the regions of the heart.