title: Validation of a digital videodensitometric program analysis for measurement of left ventricular ejection fraction.
abstract: Left ventricular (LV) function was studied in 30 patients using digital subtraction angiography by the intravenous approach. Each ventriculogram was processed with a specific videodensitometric analysis to determine LV ejection fraction. The program was verified in an experimental set-up consisting of nine latex balloons filled with contrast medium. Its validation has been established by comparing videodensitometric results with classical results supplied by geometric methods. A good correlation was obtained (r = 0.9449) and, furthermore, with experimental models, videodensitometric analysis seemed to be more accurate than geometric analysis. Digital videodensitometry appears to be a valuable and accurate method for quantifying LV function, and a promising technique for determination of the real volumes.
authors.forename: J C
authors.initials: JC
authors.lastname: Gaux
authors.forename: H
authors.initials: H
authors.lastname: Vuthien
authors.forename: G
authors.initials: G
authors.lastname: Letienne
authors.forename: C Y
authors.initials: CY
authors.lastname: Angel
authors.forename: J M
authors.initials: JM
authors.lastname: Pernes
authors.forename: A
authors.initials: A
authors.lastname: Raynaud
authors.forename: P
authors.initials: P
authors.lastname: Brenot
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000792:Angiography / Q000379:methods; D003720:Densitometry; D005260:Female; D006801:Humans; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D011856:Radiographic Image Enhancement; D013318:Stroke Volume; D013382:Subtraction Technique; D014741:Video Recording / Q000379:methods