Myocytes, CardiacIschemiaMyocardial IschemiaBrain IschemiaMyocardiumHeartHeart VentriclesMyocardial ContractionCardiac OutputArrhythmias, CardiacReperfusion InjuryMyocardial Reperfusion InjuryRats, Sprague-DawleyCalciumTime FactorsCardiomegalyCardiac Surgical ProceduresMuscle CellsCells, CulturedDeath, Sudden, CardiacRats, WistarVentricular FunctionDisease Models, AnimalCardiac Pacing, ArtificialCardiotonic AgentsMyocardial InfarctionIschemic Attack, TransientDogsCalcium Channels, L-TypeHeart AtriaElectrocardiographyGuinea PigsReperfusionSodium-Calcium ExchangerWarm IschemiaPatch-Clamp TechniquesHeart DiseasesIsoproterenolHemodynamicsAction PotentialsAnimals, NewbornPotassium ChannelsSarcolemmaRabbitsHeart FailureIschemic Preconditioning, MyocardialHeart RateCardiomyopathiesMitochondria, HeartCardiac TamponadeIschemic PreconditioningCardiac CatheterizationMembrane PotentialsVentricular Function, LeftCalcium SignalingCold IschemiaHeart ArrestModels, CardiovascularCoronary CirculationAdrenergic beta-AgonistsTroponin ISarcoplasmic ReticulumEchocardiographyBlood PressureGerbillinaeMyocardial ReperfusionSpinal Cord IschemiaMice, Inbred C57BLElectrophysiologyCardiac MyosinsMyoblasts, CardiacVentricular RemodelingPerfusionSignal TransductionHeart Conduction SystemSarcomeresCardiac Output, LowDose-Response Relationship, DrugCell SizePericardiumCoronary DiseaseRNA, MessengerMice, KnockoutCardiac GlycosidesSarcoplasmic Reticulum Calcium-Transporting ATPasesCardiac Imaging TechniquesNeuroprotective AgentsReceptors, Adrenergic, betaMice, TransgenicEnzyme InhibitorsRyanodine Receptor Calcium Release ChannelHeart TransplantationAdenosine TriphosphateEndocardiumCalcium ChannelsMuscle ProteinsAnti-Arrhythmia AgentsHeart Function TestsInfarction, Middle Cerebral ArteryCaffeine