ElectrocardiographyElectrocardiography, AmbulatoryArrhythmias, CardiacVectorcardiographyEchocardiographyExercise TestHeart Conduction SystemHeart RateSignal Processing, Computer-AssistedMyocardial InfarctionChest PainMagnetocardiographyHeartPredictive Value of TestsBrugada SyndromeHeart DiseasesDeath, Sudden, CardiacHeart BlockSensitivity and SpecificityBundle-Branch BlockCoronary DiseaseProspective StudiesSyncopeTelemetryHypertrophy, Left VentricularMyocardial IschemiaCoronary AngiographyHeart AuscultationTachycardia, VentricularVentricular Premature ComplexesLong QT SyndromeTachycardiaAtrial FibrillationMonitoring, PhysiologicKinetocardiographyHeart VentriclesPhonocardiographyCardiomyopathiesAngina PectorisCardiotocographyTime FactorsBody Surface Potential MappingBradycardiaWolff-Parkinson-White SyndromeDiagnosis, Computer-AssistedFollow-Up StudiesPrognosisAutonomic Nervous SystemThalliumTachycardia, SupraventricularTachycardia, SinusDipyridamolePericarditisAnti-Arrhythmia AgentsCardiomyopathy, HypertrophicAtrioventricular BlockRisk FactorsDeath, SuddenRadionuclide VentriculographyDobutamineCreatine KinaseVentricular Dysfunction, LeftCardiac Pacing, ArtificialElectrodesCardiologyTakotsubo CardiomyopathyVentricular Function, LeftPeripartum PeriodBlood PressureAngiocardiographyHeart AtriaTroponin TThallium RadioisotopesTreatment OutcomePacemaker, ArtificialAtrioventricular NodeHeart Function TestsEmergency Medical TechniciansRetrospective StudiesRisk AssessmentStroke VolumeCardiology Service, HospitalCardiomyopathy, DilatedReproducibility of ResultsRadiography, ThoracicCardiac CatheterizationCardiac Complexes, PrematureCoronary Artery DiseaseMyocardiumVentricular FibrillationHeart MurmursSportsHeart FailurePhysical ExertionPhysical ExaminationPrevalenceHypertensionModels, CardiovascularEchocardiography, DopplerIntraoperative Complications