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Presents information on a study which identified the dopamine receptor in the gut regions of rats. Background of the actions of dopamine; Methodology used in the study; Results and its implications.

Describes hypertensive emergencies and hypertensive urgencies. Epidemiology of hypertension; Pathophysiology of the condition; Approaches to therapy, including parenteral therapy with beta-blockers; Development of other therapies, including the peripheral dopamine-receptor agonist fenoldapam.