Cardiac VolumeEchocardiography, Four-DimensionalFetal HeartEchocardiography, Three-DimensionalHeartStroke VolumePostoperative ComplicationsMyocytes, CardiacCardiac OutputBlood VolumeCardiac Surgical ProceduresTreatment OutcomeArrhythmias, CardiacRetrospective StudiesDeath, Sudden, CardiacTime FactorsIntraoperative ComplicationsHeart Diseases