Myotonic DystrophyHeart Conduction SystemMuscular DystrophiesNeural ConductionMyotonic DisordersAtrioventricular NodeArrhythmias, CardiacNAV1.5 Voltage-Gated Sodium ChannelTrinucleotide Repeat ExpansionHeart BlockMuscular Dystrophy, DuchenneElectrocardiographyMyocytes, CardiacCardiac ElectrophysiologyTrinucleotide RepeatsCorneal Dystrophies, HereditaryBundle of HisPurkinje FibersHeartMuscular Dystrophy, AnimalMyotoniaConnexinsSodium ChannelsSinus Arrest, CardiacMyocardiumMuscular Dystrophy, FacioscapulohumeralAtrioventricular BlockPedigreeMuscular Dystrophy, Emery-DreifussDeath, Sudden, CardiacConnexin 43Sinoatrial NodeBrugada SyndromeFuchs' Endothelial DystrophyMutationRNA-Binding ProteinsKearns-Sayre SyndromeMuscle, SkeletalHeart VentriclesBradycardiaProtein-Serine-Threonine KinasesCardiac Pacing, ArtificialAction PotentialsElectrophysiologic Techniques, CardiacModels, CardiovascularDNA Repeat ExpansionRetinal DystrophiesHeart DiseasesSp4 Transcription FactorChromosomes, Human, Pair 19PhenotypeMice, TransgenicDystrophinPacemaker, ArtificialBundle-Branch BlockHeart AtriaCardiac OutputAnti-Arrhythmia AgentsDisease Models, AnimalGap JunctionsMuscle ProteinsElectrophysiologyT-Box Domain ProteinsCardiomyopathy, DilatedLamin Type ARepetitive Sequences, Nucleic AcidAlternative SplicingMyoblastsTime FactorsHeart RateDogsDNA Mutational AnalysisMusclesMyotonia CongenitaRNA, MessengerMice, Inbred mdxCardiac Surgical ProceduresBase SequenceGene Expression Regulation, DevelopmentalLens DiseasesElectromyographyChromosomes, Human, 19-20Long QT SyndromeRNANeuromuscular DiseasesMolecular Sequence DataHomeodomain ProteinsNeuroaxonal DystrophiesSarcoglycansMice, KnockoutSyndromeLac OperonExonsMuscle WeaknessMuscle Fibers, SkeletalBone Conduction