title: Non-invasive cardiac output measurement.
mesh_terms: D001013:Aorta, Thoracic / Q000033:anatomy & histology; D001783:Blood Flow Velocity; D002302:Cardiac Output; D006321:Heart / Q000502:physiology; D006801:Humans; D008722:Methods; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography