title: Probe radiocardiography: validation of a technique to routinely determine left ventricular ejection fraction.
abstract: We investigated the probability of obtaining a valid radiocardiogram with the first commercially available cardiac probe and a peripheral injection of the radiopharmaceutical. Measurements of left ventricular ejection fraction (LVEF) were obtained in a series of 15 patients undergoing cardiac catheterization. Probe LVEF determinations using central, peripheral and rapid sequential injections correlated well with each other and with ventriculography (r = .88--.98). By documenting its accuracy and precision, this study confirms the validity of a new technique for measuring LVEF.
mesh_terms: D006328:Cardiac Catheterization; D002302:Cardiac Output; D003102:Colloids; D005069:Evaluation Studies as Topic; D006331:Heart Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006801:Humans; D008722:Methods; D011877:Radionuclide Imaging; D012588:Scintillation Counting / Q000295:instrumentation*; D013455:Sulfur; D013667:Technetium
chemical_list: D003102:Colloids; D013455:Sulfur; D013667:Technetium