Heart Septal Defects, AtrialVena Cava, SuperiorPulmonary VeinsHeart Septal DefectsHeart Septal Defects, VentricularBufo marinusHeartSinoatrial NodeCor TriatriatumHeart Defects, CongenitalEchocardiography, TransesophagealHeart AtriaFetal HeartEchocardiographySeptal Occluder DeviceHeart RateCranial SinusesMaxillary SinusSinus of ValsalvaHeart Conduction SystemUltrasonography, PrenatalParanasal SinusesVena Cava, InferiorHeart SeptumCardiac CatheterizationMyocardiumCavernous SinusCarotid SinusUltrasonography, Doppler, PulsedFrontal SinusCardiac Surgical ProceduresParanasal Sinus DiseasesCoronary SinusSphenoid SinusAortopulmonary Septal DefectBlood Flow VelocityBalloon OcclusionAtrial SeptumPregnancyTransposition of Great VesselsGestational AgeProstheses and ImplantsUmbilical VeinsInfant, NewbornEchocardiography, Doppler, ColorHeart FailureMembrane PotentialsTetralogy of FallotPulmonary AtresiaPregnancy Trimester, FirstFetal DiseasesAbnormalities, MultipleHeart DiseasesSinus Thrombosis, IntracranialHeart InjuriesUltrasonography, DopplerHeart ValvesProsthesis ImplantationNuchal Translucency MeasurementSick Sinus SyndromeEndocardial Cushion DefectsEthmoid Sinus