RADIONUCLIDE EJECTION FRACTION - COMPARISON OF 3 RADIONUCLIDE TECHNIQUES WITH CONTRAST ANGIOGRAPHY

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  • 1 January 1977
    • journal article
    • research article
    • Vol. 18  (12) , 1159-1166
Abstract
Left-ventricular ejection fraction (EF) can be measured by several radionuclide methods. The EF determined by 3 methods (first-transit time-activity, equilibrium blood-pool time-activity and equilibrium blood-pool area-length) were compared in 30 patients with EF measured by area-length analysis of X-ray contrast angiograms. Both time-activity methods (first-transit and blood-pool) yielded EF that correlated well with X-ray contrast EF (r = 0.86 and 0.84, respectively). Area-length analysis of blood-pool images yielded EF that agreed less well with X-ray contrast EF (r = 0.73 in the RAO [right anterior oblique] view, 0.70 in the LAO [left anterior oblique] view). First-transit and blood-pool techniques are equally accurate methods for determining EF when the time-activity method of analysis is employed.