Circadian RhythmPeriodicityBiological ClocksSuprachiasmatic NucleusPeriod Circadian ProteinsCircadian Rhythm Signaling Peptides and ProteinsActivity CyclesSleep Disorders, Circadian RhythmPhotoperiodCircadian ClocksCLOCK ProteinsAlpha RhythmAtrial FibrillationARNTL Transcription FactorsLightDarknessChronobiology DisordersTime FactorsElectric CountershockMotor ActivityMolecular Sequence DataKineticsElectrocardiographyCryptochromesAnti-Arrhythmia AgentsBeta RhythmBody TemperatureModels, BiologicalSleepHeart RateMutationJet Lag SyndromeAmino Acid SequenceDelta RhythmHeart Conduction SystemArrhythmias, CardiacCatheter AblationNeuronsAccelerated Idioventricular RhythmHeart AtriaLocomotionBase SequenceAction PotentialsCardiac Pacing, ArtificialOscillometryElectroencephalographyChronobiology PhenomenaElectrophysiologyTemperatureRNA, MessengerWakefulnessAtrial FlutterNerve NetProtein BindingAlgorithmsAmiodaroneFeeding BehaviorGene Expression RegulationBehavior, AnimalHeart BlockModels, MolecularCatalysisNuclear Receptor Subfamily 1, Group D, Member 1Electrophysiologic Techniques, CardiacTranscription FactorsHydrocortisoneEscherichia coliArrhythmia, SinusLightingAtrioventricular NodeRespirationBinding SitesDrosophila ProteinsCell LineTreatment OutcomePacemaker, ArtificialGanglia, InvertebrateSinoatrial NodeComputer SimulationTachycardia, SupraventricularFlavoproteinsAnalysis of VarianceSignal TransductionNuclear ProteinsMedulla OblongataAtrial Function, LeftRats, Sprague-DawleyElectrocardiography, AmbulatorySubstrate SpecificityMice, Inbred C57BLTranscription, GeneticDrug ChronotherapyCasein Kinase IepsilonMesocricetusCardiac Complexes, PrematureBrainCells, CulturedCorticosteroneModels, NeurologicalRespiratory Mechanics