title: The radionuclide ejection fraction: a comparison of three radionuclide techniques with contrast angiography.
abstract: Left-ventricular ejection fraction (EF) can be measured by several radionuclide methods. The EFs determined by three such methods (first-transit time-activity, equilibrium blood-pool time-activity, and equilibrium blood-pool area-length) were compared in 30 patients with EFs measured by area-length analysis of x-ray contrast angiograms. Both time-activity methods (first-transit and blood-pool) yielded EFs that correlated well with x-ray contrast EFs (r=0.86 and 0.84, respectively). Area-length analysis of blood-pool images yielded EFs that agreed less well with x-ray contrast EFs (r=0.73 in the RAO view, 0.70 in the LAO view). We conclude that first-transit and blood-pool techniques are equally accurate methods for determining EF when the time-activity method of analysis is employed.
mesh_terms: D000328:Adult; D000368:Aged; D000790:Angiocardiography; D002302:Cardiac Output; D003287:Contrast Media; D006321:Heart / Q000000981:diagnostic imaging*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008722:Methods; D008875:Middle Aged; D011877:Radionuclide Imaging
chemical_list: D003287:Contrast Media