Abstract: Objective To evaluate the value of(¹⁸F-fluorodeoxyglucose, ¹⁸F-FDG)coincidence imaging and(^99mTc-sestamibi, ^99mTc-MIBI)myocardial perfusion imaging diagnosis the myocardial viability after myocardial infarct. Methods 24 cases myocardial infarcts patients undertaking angiography, ^99mTc-MIBI stress and rest myocardial perfusion imaging, ¹⁸F-FDG coincidence metabolism imaging(fasting-glucose stress one day imaging) with single phone emission computer tomography. Results 27 out of 49 ^99mTc-MIBI reduced myocardial perfusion myocardial segments mismatch fasting and glucose stress ¹⁸F-FDG uptake suggesting the viable myocardial. 22 segments with reduced myocardial perfusion match fasting and glucose stress ¹⁸F-FDG uptake suggesting no viable myocardial. Fasting imaging viable myocardial can uptake less ¹⁸F-FDG but image well, glucose stress imaging viable myocardial can uptake more ¹⁸F-FDG and improved the image quality. Conclusions Fasting and glucose stress can show myocardial viability, imaging quality was less well in fasting and improved in glucose stress.