| Cardiac output by transesophageal echocardiography using continuous-wave Doppler across the aortic valve. | |
| | |
MedLine Citation:
|
PMID: 8024133 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
BACKGROUND: The use of transesophageal echocardiography for the determination of cardiac output (CO) has been limited to date. We assessed the capability of aortic continuous-wave Doppler transesophageal echocardiography to determine CO (DCO) in a transgastric long-axis imaging plane of the heart by comparing DCO to thermodilution CO (TCO). METHODS: DCO was determined in 63 consecutive patients undergoing cardiac surgery. Aortic valve area was obtained from the transverse short-axis view of the valve assuming a triangular shape for the valve orifice. Stroke volume was calculated as the product of velocity-time integral and aortic valve area: stroke volume = velocity-time integral x aortic valve area. DCO was calculated off-line, by multiplying stroke volume with heart rate: DCO = stroke volume x heart rate. RESULTS: The aortic valve orifice was easily imaged in all patients. Excellent-quality continuous-wave Doppler flow profiles were obtained in nearly all (62 of 63). A total of 109 DCO determinations were performed. Mean DCO was 4.35 +/- 1.18 l.min-1 (range 2.02-7.42 l.min-1), and mean TCO was 4.41 +/- 1.17 l.min-1 (range 2.24-8.94 l.min-1). Very high correlation and agreement were found between the two methods: DCO = 0.94 x TCO + 0.19, r = 0.94, SEE (standard error of the estimate) = 0.41 l.min-1; 95% confidence interval = 0.06 +/- 0.83 l.min-1. Relative changes from pre- to postbypass CO (delta) also showed a strong correlation (delta DCO = 0.93 x delta TCO + 5.4%, r = 0.82, SEE = 17.8%). For CO changes greater than 10%, Doppler was in accordance with thermodilution in 43 of 45 measurements. DCO repeatability coefficient was 0.51 l.min-1. CONCLUSIONS: Compared to thermodilution, continuous-wave Doppler measurements of blood flow velocity across the aortic valve in the transesophageal echocardiographic transgastric view allow accurate CO determination. |
| | |
Authors:
|
P L Darmon; Z Hillel; A Mogtader; B Mindich; D Thys |
Related Documents
:
|
3951193 - Development of heart and aortic lesions in dba/2ncrj mice. 12570733 - A review of macrolide treatment of atherosclerosis and abdominal aortic aneurysms. 17713803 - Atorvastatin decreases triacylglycerol-associated risk of vascular events in coronary h... |
Publication Detail:
|
Type: Clinical Trial; Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Anesthesiology Volume: 80 ISSN: 0003-3022 ISO Abbreviation: Anesthesiology Publication Date: 1994 Apr |
Date Detail:
|
Created Date: 1994-08-04 Completed Date: 1994-08-04 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 1300217 Medline TA: Anesthesiology Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 796-805; discussion 25A Citation Subset: AIM; IM |
Affiliation:
|
Department of Anesthesiology, St. Luke's-Roosevelt Hospital Center, College of Physicians and Surgeons, Columbia University, New York, New York 10025. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Aorta
/
ultrastructure Aortic Valve / anatomy & histology, ultrasonography* Cardiac Output* Echocardiography, Doppler / methods Echocardiography, Transesophageal / methods* Heart / anatomy & histology, physiology Humans Models, Cardiovascular Reproducibility of Results Systole / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Diphenhydramine enhances the interaction of hypercapnic and hypoxic ventilatory drive.
Next Document: Burns from warming devices in anesthesia. A closed claims analysis.