Skip to content


  • Poster presentation
  • Open Access

Noninvasive monitoring of cardiac output in critically ill patients: transesophageal Doppler vs transesophageal echocardiography

  • 1,
  • 2,
  • 1,
  • 1,
  • 1,
  • 2 and
  • 1
Critical Care200610 (Suppl 1) :P346

  • Published:


  • Catheter
  • Cardiac Output
  • Pulmonary Artery
  • Septic Shock
  • Emergency Medicine


Transesophageal Doppler (TED) increases prognosis in perioperative time [1] by detecting cardiac output (CO) variations [2]. Transesophageal echocardiography (TEE) is progressively considered as an alternative to the pulmonary artery catheter in the ICU. The purpose of this study is to compare cardiac output measurement using two ultrasound-based technologies: TED vs TEE.


Twenty-one ventilated patients in septic shock were enrolled in two ICU units. The CO was recorded successively with TEE (COTEE) (Toshiba) and with TED (COTED) (Hemosonic 100 Arrow® and DOPTEK-ODM®) at the initial phase of septic shock. COTEE was obtained by measurement of the aortic velocity (ITVAo) in the transgastric view and by measurement of the aortic area in the transesophageal view (CSA): CSA × ITVAo × HR. An average of three measurements was recorded for each technique. A Bland-Altman study was used to compare the two techniques.


Bad correlation was found between the two ultrasound-based technologies (correlation coefficient = 0.09; P = NS) with an overestimation of COTED on COTEE of 1.4 ± 5.4 l/min. These differences were found with the two Doppler types used.


Comparison of two non-invasive techniques to obtain CO output proves a low correlation between absolute value measurements of CO. Even though prolonged use is possible with TED, the absolute values obtained with TED have to be carefully interpreted.

Figure 1

Figure 2

Authors’ Affiliations

Bichat Claude Bernard, Paris, France
Cochin, Paris, France


  1. Venn R: Randomized controlled trial to investigate influence of fluid challenge on duration of hospital stay and perioperative morbidity in patients with hip fractures. Br J Anaesth 2002, 88: 65-71. 10.1093/bja/88.1.65View ArticlePubMedGoogle Scholar
  2. Cariou A: Non invasive cardiac output monitoring by aortic blood flow determination. Crit Care Med 1998, 26: 2066-2072. 10.1097/00003246-199812000-00043View ArticlePubMedGoogle Scholar


© BioMed Central Ltd 2006