Journal article
Estimation of Left Ventricular Ejection Fraction by Semiautomated Edge Detection
Echocardiography (Mount Kisco, N.Y.), Vol.15(8), pp.713-719
11/1998
DOI: 10.1111/j.1540-8175.1998.tb00671.x
PMID: 11175103
Abstract
Left ventricular (LV) volume and ejection fraction estimation from two-dimensional echocardiograms requires off-line analysis and time-consuming manual tracing. LV volumes may be estimated on-line with a semiautomated edge detection echocardiographic system [also known as acoustic quantification (AQ)], but there are few data that compare volumes obtained from the AQ method with volumes derived from off-line manual tracing of conventional two-dimensional echocardiograms. Echocardiograms were performed in 48 patients at two medical centers. LV volumes were measured from the apical view with the method of discs and area-length formulae and from the parasternal short-axis view with the modified ellipsoid model. Based on the criterion of >/=75% endocardial visualization, 25 (52%) of the short-axis views and 14 (29%) of the apical views were analyzed by a single investigator. End-diastolic and end-systolic LV volumes derived on line with the AQ system showed a very strong linear association with off-line, manually traced volumes (r = 0.96-0.99). Correlations for ejection fraction also were strong (r = 0.90-0.96). End-diastolic and end-systolic LV volumes, measured from the apical views, were underestimated by the AQ method. However, because the error was in the same direction, ejection fractions measured with the AQ system and by manual tracing of conventional echocardiograms were similar. Estimation of ejection fraction using a semiautomated edge detection echocardiographic system is a promising method for noninvasive evaluation of systolic function in carefully selected patients.
Details
- Title: Subtitle
- Estimation of Left Ventricular Ejection Fraction by Semiautomated Edge Detection
- Creators
- BYRON F VANDENBERG - Cardiovascular Center, Departments of Internal Medicine, Electrical and Computer Engineering, and Preventive Medicine and Environmental Health, University of Iowa, Iowa City, IowaHIRAM CARDONA - Departments of Medicine (Cardiovascular Division) and Physics, Washington University, St. Louis, MissouriJAMES G MILLER - Departments of Medicine (Cardiovascular Division) and Physics, Washington University, St. Louis, MissouriTRUDY L BURNS - Cardiovascular Center, Departments of Internal Medicine, Electrical and Computer Engineering, and Preventive Medicine and Environmental Health, University of Iowa, Iowa City, IowaDAVID J SKORTON - Cardiovascular Center, Departments of Internal Medicine, Electrical and Computer Engineering, and Preventive Medicine and Environmental Health, University of Iowa, Iowa City, IowaJULIO E PÉREZ - Departments of Medicine (Cardiovascular Division) and Physics, Washington University, St. Louis, Missouri
- Resource Type
- Journal article
- Publication Details
- Echocardiography (Mount Kisco, N.Y.), Vol.15(8), pp.713-719
- Publisher
- Blackwell Publishing Ltd
- DOI
- 10.1111/j.1540-8175.1998.tb00671.x
- PMID
- 11175103
- ISSN
- 0742-2822
- eISSN
- 1540-8175
- Number of pages
- 7
- Language
- English
- Date published
- 11/1998
- Academic Unit
- Radiology; Epidemiology; Cardiovascular Medicine; Fraternal Order of Eagles Diabetes Research Center; Internal Medicine
- Record Identifier
- 9984094709302771
Metrics
15 Record Views