Document Detail

The accuracy of preload assessment by different transesophageal echocardiographic techniques in patients undergoing cardiac surgery.
MedLine Citation:
PMID:  18375326     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: The aim of this study was to compare the following approaches to assess left ventricular preload by transesophageal echocardiography (TEE): left ventricular end-diastolic volume index (LVEDVI) determined by using the method of disc summation (LVEDVI(Md)) and left ventricular end-diastolic area index (LVEDAI) were compared with LVEDVI assessed by the modified Simpson formula (LVEDVI(Si)). Global end-diastolic volume index (GEDVI) and stroke volume index (SVI) measured by the PiCCO(plus) system (Pulsion Medical Systems, Munich, Germany) were used as TEE-independent reference variables. DESIGN: Prospective observational study. SETTING: Community hospital. PARTICIPANTS: Twenty-two patients undergoing elective cardiac surgery. INTERVENTIONS: After the induction of anesthesia, hemodynamic assessment by TEE and the PiCCO(plus) system was made 20 (T(1)) and 10 minutes (T(2)) before and 10 (T(3)) and 20 minutes (T(4)) after a fluid trial. At each time point, LVEDVI(Md), LVEDAI, LVEDVI(Si), GEDVI, and SVI were determined. MEASUREMENTS AND MAIN RESULTS: The fluid trial resulted in a significant increase of all preload variables measured at T(3). At T(4), all preload variables but LVEDVI(Md) showed a significant decrease. The mean bias +/- 2 SD for percent changes (Delta) of LVEDVI(Md) - DeltaLVEDVI(Si) was 1.5% +/- 59.0% and for DeltaLVEDAI - Delta LVEDVI(Si) 0.9% +/- 23.6%. The correlation between LVEDVI(Md) and LVEDVI(Si) was significantly weaker than between LVEDAI and LVEDVI(Si) (p < 0.001). Comparing TEE measurements with GEDVI and SVI, strong correlations were observed for LVEDAI and LVEDVI(Si) only. CONCLUSION: The method of disc summation cannot be recommended for preload assessment during a fluid challenge in cardiac surgery patients. By contrast, single-plane area measurements provided reliable information when compared with the application of the modified Simpson formula.
Christoph K Hofer; Michael T Ganter; Andreas Rist; Richard Klaghofer; Sonja Matter-Ensner; Andreas Zollinger
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2007-08-22
Journal Detail:
Title:  Journal of cardiothoracic and vascular anesthesia     Volume:  22     ISSN:  1532-8422     ISO Abbreviation:  J. Cardiothorac. Vasc. Anesth.     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-03-31     Completed Date:  2008-06-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9110208     Medline TA:  J Cardiothorac Vasc Anesth     Country:  United States    
Other Details:
Languages:  eng     Pagination:  236-42     Citation Subset:  IM    
Institute of Anesthesiology and Intensive Care Medicine, Triemli City Hospital Zurich, Zurich, Switzerland.
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MeSH Terms
Cardiac Output / physiology
Coronary Artery Bypass, Off-Pump / methods*
Echocardiography, Transesophageal / instrumentation,  methods*
Middle Aged
Prospective Studies
Sensitivity and Specificity
Stroke Volume / physiology
Ventricular Function, Left / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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