| Semi-automated analysis of color M-mode echocardiographic images for determining transmitral pressure gradients using a simplified Euler equation. | |
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MedLine Citation:
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PMID: 12795281 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
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We hypothesize that a simplified version of the Euler equation (SEE) utilizing differences in velocity over a distance and time as obtained by Color Doppler M-mode (CMM) echocardiography can approximate actual peak transmitral pressure gradients deltaP(TM). Methods: In 14 patients undergoing open-heart surgery, deltaP(TM) was measured under various hemodynamic conditions using 2 high fidelity transducers, 5 cm apart. Transesophageal CMM images were simultaneously acquired and a customized image analysis application was used to abstract spatiotemporal velocity characteristics. Using both the SEE and a simplified Bernoulli equations, deltaP(TM) were determined and compared to the actual deltaP(TM). Results: While the simplified Bernoulli equation resulted in a poor estimate (y=0.075x+0.71, r=0.45), the deltaP(TM) obtained using the SEE correlated strongly (y=0.79x+0.48, r=0.91) with the actual measurements. Conclusions: Semi-automated analysis of CMM images using a SEE can accurately estimate actual deltaP(TM). |
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Authors:
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M S Firstenberg; N L Greenberg; M J Garcia; P L Castro; D L Prior; N G Smedira; J D Thomas |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Computers in cardiology Volume: 26 ISSN: 0276-6574 ISO Abbreviation: Comput Cardiol Publication Date: 1999 |
Date Detail:
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Created Date: 2003-06-09 Completed Date: 2003-06-25 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7504430 Medline TA: Comput Cardiol Country: United States |
Other Details:
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Languages: eng Pagination: 181-4 Citation Subset: S |
Affiliation:
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The Cardiovascular Imaging Center, The Cleveland Clinic Foundation, Cleveland, Ohio, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Automation Blood Flow Velocity / physiology Coronary Circulation / physiology* Echocardiography, Doppler, Color* Echocardiography, Transesophageal Hemodynamics Humans Image Processing, Computer-Assisted* Mitral Valve / physiology* Pressure* Transducers, Pressure |
| Grant Support | |
ID/Acronym/Agency:
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1R01HL56688-01A1/HL/NHLBI NIH HHS; NCC9-60/CC/CDC HHS; NEO-97-225-BGIA/BG/FDA HHS |
| Investigator | |
Investigator/Affiliation:
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J D Thomas / Cleveland Clinic Found, OH |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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