Objective To explore the value of dynamic electrocardiogram coronary blood supply in the evaluation of clinical efficacy of patients with coronary heart disease. Methods One hundred and twenty-four patients with coronary heart disease who underwent conventional drug therapy in our hospital were selected for the study. The coronary blood supply and clinical efficacy by dynamic electrocardiogram were recorded before conventional drug therapy and after 6 months of treatment. The differences of dynamic electrocardiogram indexes after 6 months of treatment were compared among patients with different clinical efficacy. Spearman correlation analysis was used to evaluate the correlation between dynamic electrocardiogram indexes and clinical efficacy after conventional drug therapy. Results After 6 months of treatment

the ST-segment depression

total time of ST-segment depression

mean time of ST-segment depression and frequency of myocardial ischemia were lower than those before treatment（p<0.05）.After conventional drug therapy in 124 patients with coronary heart disease

there were 58（46.77%） markedly effective cases

52（41.94%） effective cases and 14（11.29%） ineffective cases. The ST-segment depression

total time of ST-segment depression

mean time of ST-segment depression and frequency of myocardial ischemia in patients with different efficacy after conventional drug therapy showed markedly effective cases<effective cases <ineffective cases（p<0.05）. According to Spearman correlation analysis

it was found that the ST-segment depression

total time of ST-segment depression

mean time of ST-segment depression and frequency of myocardial ischemia were significantly negatively correlated with clinical efficacy after conventional drug therapy（r=-0.514

-0.594

-0.765

-0.621

p<0.05）. Conclusions Dynamic electrocardiogram coronary blood supply can be used to evaluate the treatment effects of coronary heart disease

with high clinical application value.