Myocytes, CardiacMyocardiumHeartHeart VentriclesCardiac OutputMyocardial ContractionArrhythmias, CardiacCalciumCardiomegalyCardiac Surgical ProceduresCells, CulturedMuscle CellsDeath, Sudden, CardiacAction PotentialsTime FactorsVentricular FunctionRats, Sprague-DawleyPhotic StimulationPatch-Clamp TechniquesCalcium Channels, L-TypeCardiac Pacing, ArtificialHeart AtriaGuinea PigsIsoproterenolSodium-Calcium ExchangerHeart DiseasesAnimals, NewbornMembrane PotentialsElectrophysiologyCardiac TamponadeHeart FailureCalcium SignalingRats, WistarElectric StimulationCardiomyopathiesReaction TimePotassium ChannelsSarcolemmaCardiac CatheterizationGeneralization, StimulusAcoustic StimulationDogsAdrenergic beta-AgonistsSarcoplasmic ReticulumModels, CardiovascularCardiac MyosinsHeart ArrestHeart RateSignal TransductionElectrocardiographyCardiotonic AgentsPhysical StimulationRabbitsMyoblasts, CardiacSarcomeresCell SizeMyocardial InfarctionCardiac Output, LowVisual PerceptionDiscrimination LearningVentricular RemodelingDose-Response Relationship, DrugCardiac GlycosidesTroponin IHemodynamicsCalcium ChannelsEchocardiographySarcoplasmic Reticulum Calcium-Transporting ATPasesHeart Conduction SystemDiscrimination (Psychology)Analysis of VarianceRyanodine Receptor Calcium Release ChannelReceptors, Adrenergic, betaCaffeineCardiac Imaging TechniquesVentricular Function, LeftMitochondria, HeartMyocardial IschemiaMuscle ProteinsRNA, MessengerCatsDisease Models, AnimalMice, Inbred C57BLMice, TransgenicHeart TransplantationPattern Recognition, VisualCardiomyopathy, DilatedPericardiumPsychophysicsSodium ChannelsAttentionAtrial Natriuretic FactorSensory ThresholdsMice, KnockoutOut-of-Hospital Cardiac ArrestElectric ConductivityNeuronsBlood PressureCardiac ElectrophysiologyCardiac Volume