title: Noninvasive cardiac output measurement: troubled technologies and troubled studies.
authors.forename: L C
authors.initials: LC
authors.lastname: Siegel
authors.forename: R G
authors.initials: RG
authors.lastname: Pearl
mesh_terms: D000818:Animals; D002302:Cardiac Output / Q000502:physiology*; D004285:Dogs; D006801:Humans; D007442:Intubation, Intratracheal; D008991:Monitoring, Physiologic / Q000379:methods; D013552:Swine; D013815:Thermodilution / Q000379:methods; D014465:Ultrasonics