Videodensitometric processing of contrast two-dimensional echocardiographic data
January 1982
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We developed a computer program to analyze videodensity changes due to contrast appearance within a given operator-designated rectangle using two-dimensional echocardiograms previously recorded on videotape. Videodensity curves have been obtained from two-dimensional echocardiographic recordings in 14 patients after a total of 32 injections of 5% dextrose solution into the left ventricle during cardiac catheterization. The resulting videodensity vs time curves have some characteristics of indicator-dilution curves. The decay phase of these curves is largely mono-exponential. Potential clinical applications of this technique in measurement of ejection fraction, cardiac output and shunt quantification are discussed, as well as some potential limitations.
- Support, Non-U.S. Gov't
- Echocardiography/*methods
- 50-99-7 (Glucose)
- Glucose/diagnostic use
- Computers
- Densitometry/methods
- Indicator Dilution Techniques
- Videotape Recording
- videodensity
- curve
- contrast
- injection
- analysis
- decay
- echocardiographic
- patient
- meltzer
- videodensity curves
- contrast injections
- study
- log videodensity
- indicator-dilution curves
- frame
- decay phase
- correlation
- bommer
- videodensitometric
- video
