title: An improved method of right ventricular gated equilibrium blood pool radionuclide ventriculography.
abstract: Gated blood pool radionuclide ventriculography provides a means for obtaining repeated studies of both cardiac ventricles with a single dose of radionuclide. Quantitative assessment of right ventricular (RV) function using this technique has been complicated by several technical problems. We describe a new method of RV blood pool analysis which attempts to solve these problems using well-established concepts for left ventricular (LV) blood pool analysis: (1) variable regions of interest; (2) computer edge detection with operator intervention; and (3) computer selected background. Results showed a strong linear correlation between gated first pass RV ejection fraction (RVEF) and the gated blood pool RVEF (n = 22; r = 0.93; blood pool RVEF = 0.03 + 0.89 X first pass RVEF; Sy.x = 0.04). There was also a strong linear correlation between LV and RV stroke counts in patients without valvular regurgitation, intracardiac shunts, or ventricular aneurysms (n = 19; r =0.86; RV counts = 72 + 0.94 X LV counts; Sy.x = 116). In terms of both of these validation standards this method proved superior to three published methods of RV blood pool analysis that used hand-drawn regions, and is suitable for analysis of rest, exercise, and intervention studies of RV function.
mesh_terms: D000328:Adult; D000368:Aged; D002302:Cardiac Output; D002318:Cardiovascular Diseases / Q000000981:diagnostic imaging*; D003201:Computers; D006321:Heart / Q000000981:diagnostic imaging*; D006334:Heart Function Tests / Q000379:methods; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006801:Humans; D008875:Middle Aged; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D013318:Stroke Volume; D013667:Technetium
chemical_list: D013667:Technetium; D013670:Sodium Pertechnetate Tc 99m