STUDIES OF ASSESSMENT OF MYOCARDIAL VIABILITY BY TC-99M SESTAMIBI MYOCARDIAL SCINTIGRAPHY AND APPLICATION IN CORONARY REVASCULARIZATION

摘要

The purpose of the studies were to explore the effective ways to enhance theability of routine rest Tc-99m-sestamibi（MIBI）myocardial scintigraphy toassess myocardial viability and to evaluate value of eletrocardiographic（ECG）changes during the percutaneous transluminal coronary angioplasty（PTCA）In assessing viable myocardium,Four methods,（1）rest-nitroglycerinaugment,（2）rest-gated,and（4）meaaurement of ECG changes in ST-T,QRSelectric axis were used in 20,30,10 and 15 patients with coronary artery d.s-ease treated with coronary revascularization.The results showed that in eval-uating viable myocardium,the positive predictive values for methods（1）-（4）were 95.9%,68.5%.84.1% and 88.9%,respectively,the negative predic.tive values were 68.2%.90.1%,90.0% and 83.30%.respectively:the predic-tire accuracy rates were 82.5%,77.3%,87.2% and 86.7%,respectively,The results indicate that identification of viable myocardium with 99mTc-MIBI can be effectively enhanced with methods（1）-（3）;the method（4） isgood one to assess myocardial viability,the 99mTc-MIBI myocardial scintig-rephy can provide objective data for evaluating treatment effects by coromaryrevascularization.