title: Videodensitometric ejection fractions from intravenous digital subtraction left ventriculograms: correlation with conventional direct contrast and radionuclide ventriculography.
abstract: Forty-three patients who had undergone direct-contrast ventriculography were submitted to intravenous digital subtraction ventriculography and first-pass radionuclide ventriculography to compare the left ventricular ejection fractions obtained by each method. Ejection fractions were calculated by the area-length method from the direct contrast ventriculograms, by both area-length and videodensitometric methods from the digital subtraction ventriculograms, and by count densitometry from the radionuclide ventriculograms. Satisfactory correlations were found between values obtained by the late mask resubtracted videodensitometric method and the radionuclide method (r = 0.85) and by the digital ventriculographic area length method and direct-contrast method (r = 0.88). Videodensitometric methods may be an alternative way to estimate left ventricular ejection fractions accurately without reliance on geometric assumptions about the shape of the left ventricular cavity.
mesh_terms: D000703:Analog-Digital Conversion; D000792:Angiography; D002302:Cardiac Output; D003287:Contrast Media; D017023:Coronary Angiography; D003720:Densitometry / Q000379:methods; D003973:Diatrizoate; D003974:Diatrizoate Meglumine; D004338:Drug Combinations; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D004369:Pentetic Acid; D011877:Radionuclide Imaging; D013318:Stroke Volume; D013382:Subtraction Technique; D013667:Technetium; D016284:Technetium Tc 99m Pentetate
chemical_list: D003287:Contrast Media; D004338:Drug Combinations; D003973:Diatrizoate; D003974:Diatrizoate Meglumine; D013667:Technetium; D004369:Pentetic Acid; C027278:urovision; D016284:Technetium Tc 99m Pentetate