LevocardiaEchocardiographyEchocardiography, Doppler, ColorHeart Defects, CongenitalMyxomaHeart Septal Defects, VentricularSinus of ValsalvaHeart NeoplasmsDiagnostic ErrorsEchocardiography, TransesophagealUltrasonography, PrenatalPulmonary VeinsHeart AtriaPrenatal DiagnosisPrenatal Exposure Delayed EffectsInfant, NewbornPrenatal CareEchocardiography, DopplerPregnancyMitral ValveHeart VentriclesVentricular Function, LeftVentricular Dysfunction, LeftEchocardiography, Three-Dimensional