Heart BlockHeartAdams-Stokes SyndromeHeart RateFar EastPacemaker, ArtificialAtrioventricular NodeMiddle EastRNA, Small CytoplasmicBradycardiaAtrioventricular BlockAntibodies, AntinuclearHeart Defects, CongenitalElectrocardiographyFetal HeartFetal DiseasesCardiac Pacing, ArtificialHeart FailureHeart Conduction SystemBundle of HisHeart Rate, FetalHeart DiseasesBundle-Branch BlockMaternal-Fetal ExchangeRibonucleoproteinsNerve BlockSteroids, FluorinatedKearns-Sayre SyndromeEndocardial FibroelastosisMyocardiumHeart TransplantationSinoatrial NodeHeart AtriaGermany, EastHeart SeptumSyncopeEchocardiographyHeart Septal Defects, VentricularPregnancyCardiomyopathiesLupus Erythematosus, CutaneousMagnetocardiographyInfant, NewbornAutoantigensAfrica, EasternAutoantibodiesHydrops FetalisLupus Erythematosus, SystemicArrhythmias, CardiacPregnancy ComplicationsTime FactorsHeart ValvesElectrocardiography, AmbulatoryAutoimmune DiseasesCardiac CatheterizationMyocardial InfarctionMyocytes, CardiacCardiomyopathy, DilatedUltrasonography, PrenatalImmunity, Maternally-AcquiredCollagen DiseasesFollow-Up StudiesHemodynamicsArrhythmia, SinusBetamethasoneMyocarditisPrenatal DiagnosisTransposition of Great VesselsHeart AuscultationSick Sinus SyndromeHeart Valve Prosthesis