Calcium ChannelsCalcium SignalingCalcium Channels, L-TypeCalcium Channel BlockersMembrane Potentialsomega-Conotoxin GVIAPatch-Clamp TechniquesCalciumCalcium, DietaryCalcium Channels, N-TypeElectrophysiologyDihydropyridinesBariumNifedipineElectric ConductivityCalcium Channels, T-TypeAction Potentialsomega-ConotoxinsCalcium CarbonateNeuronsCalcium Channel AgonistsEgtazic AcidCalcium Channels, P-Typeomega-Agatoxin IVAIon ChannelsCalcium PhosphatesIon Channel GatingCalcium IsotopesNimodipineCalcium Channels, Q-TypeGuinea PigsCells, CulturedCalcium ChlorideCalcium Channels, R-TypeKineticsMyocardiumRana catesbeianaCadmiumHeart VentriclesSpider VenomsElectric StimulationPotassiumNickelHelix (Snails)TetrodotoxinHeartCalcium OxalateGanglia, SpinalGanglia, ParasympatheticCalcium GluconateTime FactorsHEPESDose-Response Relationship, DrugCalcium RadioisotopesRats, Sprague-DawleyTetraethylammonium CompoundsChelating AgentsMollusk VenomsIsradipineMyocytes, CardiacSodiumNeurons, AfferentDifferential ThresholdIsoproterenolRana esculentaIon TransportVirulence Factors, BordetellaRabbitsCobaltPertussis ToxinTetraethylammoniumNeurotransmitter AgentsRats, WistarCesiumVerapamilPotassium ChannelsGTP-Binding ProteinsCalcium CompoundsDynorphinsThapsigarginMyocardial ContractionFura-2Animals, NewbornGuanosine 5'-O-(3-Thiotriphosphate)NitrendipineIntracellular FluidPresynaptic TerminalsLanthanumStrontiumVentricular FunctionNodose GanglionGanglia, SympatheticMibefradilMusclesSodium ChannelsSynapsesSuperior Cervical GanglionThionucleotidesMagnesiumGoldfish