Heart Rate, FetalDecelerationDiastoleEchocardiography, DopplerAccelerationInfant, PrematureInfant, NewbornEchocardiography, Doppler, PulsedMitral ValveVentricular Function, LeftBlood Flow VelocityVentricular Dysfunction, LeftHeart SoundsInfant, Premature, DiseasesInfant CareInfant FoodFetal MonitoringContrecoup InjuryVentricular PressureEchocardiographyStroke VolumeCardiotocographySystoleAtrial Function, LeftFetal DistressInfant FormulaTime FactorsInfant BehaviorBiomechanical PhenomenaBradycardiaHeart RateInfant MortalitySudden Infant DeathInfant, Newborn, DiseasesPhonocardiographyProspective StudiesSubarachnoid Hemorrhage, TraumaticPregnancyInfant Nutritional Physiological PhenomenaHeart VentriclesPulmonary VeinsVideo RecordingDemocratic Republic of the CongoCardiomyopathy, DilatedPredictive Value of Tests