title: A noncomputerized count-based technique for the determination of resting left ventricular ejection fraction.
abstract: A noncomputerized, count-based technique for the determination of left ventricular ejection fraction (LVEF), which does not use geometric assumptions of left ventricular shape, was developed. The noncomputerized technique and computerized multigated ventriculography using both fixed and variable region-of-interest (ROI) methods were performed on 16 patients. The LVEFs obtained with the noncomputerized technique correlated well with both the fixed ROI computerized technique (r =  .87) and the variable ROI computerized technique (r = .86). It is concluded that when a computer is not available, the noncomputerized technique is a valid alternative for the determination of LVEF in resting patients in stable sinus rhythm.
mesh_terms: D002302:Cardiac Output; D003201:Computers; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D013318:Stroke Volume; D013667:Technetium; D013679:Technology, Radiologic
chemical_list: D013667:Technetium; D013670:Sodium Pertechnetate Tc 99m