Circadian RhythmPeriodicityBiological ClocksSuprachiasmatic NucleusPeriod Circadian ProteinsCircadian Rhythm Signaling Peptides and ProteinsActivity CyclesSleep Disorders, Circadian RhythmPhotoperiodCircadian ClocksCLOCK ProteinsAlpha RhythmAtrial FibrillationData Interpretation, StatisticalARNTL Transcription FactorsTime FactorsLightDarknessChronobiology DisordersElectric CountershockElectrocardiographyMotor ActivityReproducibility of ResultsObserver VariationBody TemperatureCryptochromesAnti-Arrhythmia AgentsBeta RhythmHeart RateSleepAlgorithmsSensitivity and SpecificityModels, BiologicalArrhythmias, CardiacTreatment OutcomeHeart Conduction SystemElectroencephalographyJet Lag SyndromeDelta RhythmCatheter AblationHeart AtriaAccelerated Idioventricular RhythmNeuronsImage Interpretation, Computer-AssistedComputer SimulationAction PotentialsOscillometryCardiac Pacing, ArtificialRadiologyWakefulnessNerve NetBrainChronobiology PhenomenaAtrial FlutterFeeding BehaviorProspective StudiesBehavior, AnimalSoftwareAnalysis of VarianceLocomotionElectrophysiologyRetrospective StudiesLightingDiagnostic ErrorsFollow-Up StudiesReference ValuesMutationAmiodaroneModels, StatisticalElectrophysiologic Techniques, CardiacHydrocortisoneSignal Processing, Computer-AssistedHeart BlockNuclear Receptor Subfamily 1, Group D, Member 1RespirationModels, NeurologicalArrhythmia, SinusPredictive Value of TestsRadiographic Image Interpretation, Computer-AssistedAtrioventricular NodeDiagnosis, Computer-AssistedModels, TheoreticalGene Expression RegulationGene Expression ProfilingSeasonsRisk FactorsResearch DesignPacemaker, ArtificialTachycardia, SupraventricularMagnetic Resonance ImagingSinoatrial NodeCanadaStatistics as TopicTelemetryAtrial Function, LeftAge FactorsTemperatureRespiratory MechanicsGanglia, InvertebrateElectrocardiography, Ambulatory