Cardiac ElectrophysiologyElectrophysiological ProcessesElectrophysiologic Techniques, CardiacEpicardial MappingCardiac CatheterizationModels, CardiovascularArrhythmias, CardiacHeartElectrophysiologyHeart Conduction SystemVoltage-Sensitive Dye ImagingElectrophysiological PhenomenaMyocytes, CardiacElectrocardiographyUrinary CatheterizationAction PotentialsAtrioventricular NodeHeart VentriclesComputer SimulationCatheter AblationCatheterizationLong QT SyndromeMyocardiumHeart RatePotassium ChannelsCatheterization, PeripheralCardiac OutputCatheterization, Central VenousAlgorithmsCardiac Surgical ProceduresIntermittent Urethral CatheterizationCatheterization, Swan-GanzCardiac Pacing, ArtificialDeath, Sudden, CardiacTime FactorsEchocardiographyHeart DiseasesHemodynamicsHeart AtriaHeart Defects, CongenitalMyocardial InfarctionMyocardial ContractionPatch-Clamp TechniquesCardiomegalyTreatment OutcomeHypertension, PulmonarySubclavian VeinUrinary RetentionProspective StudiesCardiac TamponadeHeart FailureVentricular Function, LeftRetrospective StudiesCoronary AngiographyPulmonary Wedge PressureMembrane Potentials