[en] To determine the usefulness of Technetium-99m radionuclide ventriculography (Tc-99m RV) and Thallium-201 myocardial scintigraphy (Tl-201 MS) for predicting left ventricular performance, using 30 deg right anterior oblique (RAO) projection, results of Tc-99m RV and Tl-201 MS were assessed in 25 patients with chest pain syndrome, angina pectoris or acute myocardial infarction who underwent contrast left ventriculography and coronary arteriography. Wall motion determined by Tc-99m RV and contrast ventriculography (CV), showed poor agreement in anterobasal and posterobasal segments, 6/25 (24 %) and 11/25 (44 %), respectively. However, in the remaining anterolateral, apical and diaphragmatic segments, fair agreement was obtained, 18/25 (72 %), 22/25 (88 %), 16/25 (68 %), respectively. The relationship between wall motion and myocardial perfusion was assessed. Ninety of the 98 segments (92 %) with normal myocardial perfusion demonstrated normal wall motion, while 25 of the 27 segments (93 %) with abnormal myocardial perfusion showed abnormal wall motion. Of the five segments with severely reduced uptake, all of them showed the presence of aneurysms. In 20 patients with significant coronary artery stenosis only a marginally significant correlation (r = 0.49, p < 0.05) was noted between the Tl-201 uptake scores and the coronary arterographic scores. However, an excellent correlation was obtained between the Tl-201 uptake scores, the percent abnormally contracting segments (%ACS) (r = 0.95, p < 0.001) and the left ventricular ejection fractions (r = -0.88, p < 0.001). Our study indicates the usefulness of Tc-99m RV and Tl-201 MS in evaluating the left ventricular function (global and regional) in patients with ischemic heart disease. (author)