目的：探讨应用核素心肌灌注显像（NMPI）诊断无症状心肌梗死（MI）的临床价值。方法动态心电图或其他心电检测技术检测的无症状M I患者30例，均行NM PI和冠状动脉造影检查，计算NM PI显像阳性结果预测值。结果30例NM PI中，12例表现为不可逆性心肌缺血，18例表现为混合性心肌缺血。冠状动脉造影检出阳性血管45支（血管狭窄≥50％），其中的28支狭窄＞90％，15支70％＜狭窄≤90％，2支狭窄≤70％。NMPI阳性结果预测值为88.9％。结论 NMPI对诊断无症状MI和评估心肌损害程度有重要价值。“,”Objective To study the clinical value of nuclide myocardial perfusion imaging (NMPI) in the diagnosis of asymptomatic myocardial infarction (MI) .Methods Thirty patients with asymptomatic MI diagnosed by dynamic ECG and other electrocardiac techniques received NMPI and coronary angiography(CAG) .The positive predictive value of NMPI was calculated .Results Of 30 cases with asymptomatic MI ,20 cases showed irreversible myocardial ischemia and 18 cases showed mixed myocardial ischemia .CAG showed 45 blood vessels with stenosis ≥50% ,of which stenosis>90% in 28 vessels ,70%