Kaumann, A J The beta 1-adrenoceptor antagonist CGP 20712 A unmasks beta 2-adrenoceptors activated by (-)-adrenaline in rat sinoatrial node. [electronic resource] - Naunyn-Schmiedeberg's archives of pharmacology Apr 1986 - 406-9 p. digital Publication Type: Journal Article ISSN: 0028-1298 Standard No.: 10.1007/BF00500096 doi Subjects--Topical Terms: Adrenergic beta-Antagonists--pharmacologyAnimalsCatecholamines--pharmacologyEpinephrine--antagonists & inhibitorsHeart Rate--drug effectsImidazoles--pharmacologyIn Vitro TechniquesMaleNorepinephrine--antagonists & inhibitorsPropanolamines--pharmacologyRatsRats, Inbred StrainsReceptors, Adrenergic, beta--drug effectsSinoatrial Node--drug effects