目的:探讨CT血管造影联合3导联动态心电图(DCG-3)在冠心病(CHD)心肌缺血中的诊断价值.方法:病例来源为2019年2月至2021年2月收治的CHD心肌缺血患者共82例,入选患者先进行DCG-3检查,再接受CT血管造影.统计DCG-3检查与CT血管造影联合DCG-3检查对CHD心肌缺血的检出率,评价诊断效能.结果:CT血管造影联合DCG-3的检出率为93.90％,与DCG-3检出率89.02％比较,无明显差异(P ＞ 0.05).CT血管造影联合DCG-3对CHD心肌缺血的诊断灵敏度为96.10％,“,”Objective: To explore the diagnostic value of CT angiography combined with 3-lead dynamic electrocardiogram (DCG-3) in coronary heart disease (CHD) myocardial ischemia. Method The source of the cases is a total of 82 patients with CHD myocardial ischemia admitted from February 2019 to February 2021. The selected patients undergo DCG-3 examination first, and then receive CT angiography. The detection rate of DCG-3 examination and CT angiography combined with DCG-3 examination for CHD myocardial ischemia was counted, and the diagnostic efficiency was evaluated.Result The detection rate of CT angiography combined with DCG-3 was 93.90％, which was no significant difference compared with the detection rate of DCG-3 (89.02％) (P＞0.05). The diagnostic sensitivity of CT angiography combined with DCG-3 for CHD myocardial ischemia was 96.10％, which was equivalent to 89.04％ with DCG-3 alone (P＞0.05);the specificity and accuracy of CT angiography combined with DCG-3 for CHD myocardial ischemia were 80.00％ and 95.12％, respectively. Compared with DCG-3, the detection rate was 66.67％ and 86.59％, which was significantly higher (P＜0.05).Conclusion CT angiography combined with DCG-3 has high diagnostic efficiency in CHDX myocardial ischemia, and can be promoted in clinical practice.