Atrial Function, LeftAtrial FunctionAtrial Function, RightHeart AtriaAtrial FibrillationEchocardiography, DopplerMyocardial ContractionElectric CountershockStress, MechanicalBiomechanical PhenomenaEchocardiography, Doppler, PulsedPericardiectomyDilazepEchocardiographyVentricular Function, LeftHeart Function TestsFibrocartilageHeartGalliformesMyocardiumElasticityEchocardiography, TransesophagealAprindineHemodynamicsVentricular FunctionTensile StrengthObserver VariationMyocardial StunningMyocardial Reperfusion InjuryStroke VolumeCoronary CirculationAtrial AppendageBlood Flow VelocityPerfusionMechanical ProcessesMyocardial IschemiaTissue EngineeringRats, Sprague-DawleyMyocardial ReperfusionEnergy MetabolismPhosphocreatinePressureTime FactorsIntervertebral DiscPurinergic P1 Receptor AgonistsDogsTissue ScaffoldsMechanical PhenomenaModels, BiologicalGlycolysisExtracellular MatrixMyocytes, CardiacHeart DiseasesMuscle ContractionHeart VentriclesMuscle, SkeletalAdenosine TriphosphateHeart Conduction SystemCollagenRespiration, ArtificialComputer SimulationMechanotransduction, CellularOxygen ConsumptionSwine