AtenololPropranololAdrenergic beta-AntagonistsPropanolaminesMetoprololHeart RatePindololAdrenergic beta-1 Receptor AntagonistsPractololReceptors, Adrenergic, betaIsoproterenolAcebutololNadololBlood PressureBetaxololOxprenololDouble-Blind MethodAntihypertensive AgentsHypertensionPhentolamineLabetalolAdrenergic beta-AgonistsEpinephrineReceptors, AdrenergicBendroflumethiazideButoxamineNorepinephrinePhysical ExertionSympatholyticsCeliprololClinical Trials as TopicTremorPulseAdrenergic alpha-AntagonistsHydrochlorothiazideHemodynamicsDelayed-Action PreparationsReceptors, Adrenergic, beta-1NifedipineAdrenergic AntagonistsDrug InteractionsCatecholaminesAtropinePrazosinRandom AllocationDogsDrug Therapy, CombinationDose-Response Relationship, DrugEthanolaminesDoxazosinSympathomimeticsAdrenergic beta-2 Receptor AntagonistsHeartStereoisomerismAmlodipineAdrenergic beta-1 Receptor AgonistsAngina PectorisReceptors, Adrenergic, alphaMethyldopaPhenoxybenzamineOxyfedrineSympathetic Nervous SystemPlacebos