Stroke volume calculation by esophageal Doppler integrates velocity over time and multiplies this "area under the curve" by the cross sectional area of the aorta.
Archer
Thomas L
TL
Funk
Duane J
DJ
Moretti
Eugene
E
Gan
Tong J
TJ
D001011:Aorta / Q000000981:diagnostic imaging / Q000503:physiopathology*; D002302:Cardiac Output / Q000502:physiology*; D006801:Humans; D008962:Models, Theoretical; D016343:Monitoring, Intraoperative / Q000295:instrumentation* / Q000379:methods; D019990:Perioperative Care / Q000295:instrumentation* / Q000379:methods; D013318:Stroke Volume; D013599:Systole; D018608:Ultrasonography, Doppler / Q000379:methods