Cardiovascular AbnormalitiesHeart Septal DefectsHeart Septal Defects, VentricularHeart Septal Defects, AtrialTurner SyndromeHeart Defects, CongenitalWilliams SyndromeCongenital AbnormalitiesEchocardiographySportsHeartCardiovascular DiseasesElectrocardiographyHypertrophy, Left VentricularInfant, NewbornSeptal Occluder DeviceAbnormalities, Drug-InducedRisk FactorsBirth WeightPregnancyBlood PressureHeart RateAbnormalities, MultipleHeart SeptumCardiac CatheterizationCardiac Surgical ProceduresPremature BirthEchocardiography, TransesophagealNeural Tube DefectsCleft PalateAortopulmonary Septal DefectCleft LipBalloon OcclusionTransposition of Great VesselsTetralogy of FallotAtrial SeptumProstheses and ImplantsFetal HeartBirth CertificatesMusculoskeletal AbnormalitiesEchocardiography, Doppler, ColorHeart FailureInfant, Low Birth WeightPulmonary AtresiaHeart DiseasesAnencephalyHeart InjuriesMaternal ExposureHeart ValvesEndocardial Cushion DefectsBirth RateHeart Atria