Wong, D H Comparison of changes in transit time ultrasound, esophageal Doppler, and thermodilution cardiac output after changes in preload, afterload, and contractility in pigs. [electronic resource] - Anesthesia and analgesia May 1991 - 584-8 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0003-2999 Subjects--Topical Terms: Analysis of VarianceAnimalsCardiac OutputEsophagusMyocardial ContractionSwineThermodilutionTime FactorsUltrasonics