Vascular ResistanceSulfonamidesHypertension, PulmonaryReceptors, EndothelinHemodynamicsAntihypertensive AgentsBlood PressureDrug ResistancePulmonary CirculationCardiac OutputDrug Resistance, MicrobialDrug Resistance, BacterialEndothelin-1Receptor, Endothelin ARegional Blood FlowEndothelinsDrug Resistance, NeoplasmPulmonary ArteryEisenmenger ComplexRenal CirculationVasoconstrictionVasodilator AgentsHeart RateDrug Resistance, MultipleReceptor, Endothelin BDogsDisease ResistanceSulfonesForearmIloprostDrug Resistance, ViralPulmonary Wedge PressureDrug Resistance, Multiple, BacterialPurinesVasodilationEpoprostenolNitric OxideAnti-Bacterial AgentsSplanchnic CirculationDose-Response Relationship, DrugExercise ToleranceMicrobial Sensitivity TestsBlood Flow VelocityVasoconstrictor AgentsKidneyNorepinephrineHypertensionSkin UlcerTime FactorsPhenylpropionatesBlood CirculationScleroderma, SystemicPiperazinesAnoxiaPlethysmographyTreatment OutcomeLungPerfusionTetracycline ResistanceVasomotor SystemSympathetic Nervous SystemOxygenHypertension, PortalPhosphodiesterase 5 InhibitorsAngiotensin IING-Nitroarginine Methyl EsterAirway ResistanceMutationNitroprussideRats, Sprague-DawleyArterial PressureReflexAdministration, OralLower Body Negative PressureCoronary CirculationDrug Therapy, CombinationPlant DiseasesPressoreceptorsPyridazinesPenicillin ResistanceAdministration, InhalationRats, WistarPeptides, CyclicDrug Resistance, FungalCentral Venous PressureHeart Defects, CongenitalReninViper VenomsDouble-Blind MethodConnective Tissue DiseasesArteriesHypotensionBlood VolumeIsoxazolesInfusions, IntravenousOxygen ConsumptionEnzyme InhibitorsHeart FailureSheepHeart