CounterpulsationAssisted CirculationHeart-Assist DevicesCardiac Surgical ProceduresCardiopulmonary BypassCoronary Artery BypassHospital MortalityCardiac Output, LowTreatment OutcomeMyocardial InfarctionRetrospective StudiesHemodynamicsHeart ValvesIntraoperative CarePreoperative CareCoronary Artery Bypass, Off-PumpPerioperative CareBenchmarkingHemorrhageAngioplasty, Balloon, CoronaryMultiple Organ FailurePostoperative CareLength of StayStroke VolumeTime FactorsPercutaneous Coronary InterventionRisk AssessmentPostoperative ComplicationsAcute Kidney InjuryCoronary AngiographyAorta, ThoracicVentricular Dysfunction, LeftHeart FailureRisk FactorsPatient SelectionCoronary Artery DiseaseFeasibility StudiesProspective StudiesBlood Flow VelocityPractice Guidelines as TopicCoronary VesselsLogistic ModelsSurvival AnalysisBlood PressureFollow-Up Studies