ABSTRACT
Objective :To study correlation between treadmill exercise test assessing myocardial ischemia and coronary stenosis .Methods :A total of 150 patients with stable angina pectoris in our hospital ,according to vascular stenosis by coronary CT were divided into group A (stenosis＜ 50%,n＝ 50) ,group B (stenosis 50% ～75%,n＝ 50) and group C (stenosis ＞75%,n＝50).Coronary stenotic rate and ST depression during exercise test were compared a-mong three groups.Spearman method was used to analyze correlation between treadmill exercise positive rate and coronary stenosis .Results :Compared with group B ,there were significant rise in coronary diameter stenotic rate [(63.64 ± 4.21)% vs.(66.71 ± 4.46)%] and vascular diameter of reference segment [(2.92 ± 0.23) mm vs.(3.03 ± 0.21) mm] in group C ,P＜0.05 or ＜0.01. Along with coronary stenosis aggravated ,there was significant re-duction in onset time of ST depression [(712.3 ± 202.7) s vs.(602.3 ± 210.4) s vs.(501.2 ± 236.1) s] ,and signif-icant rise in duration [ (425.4 ± 200.5) s vs.(520.8 ± 205.8) s vs.(603.4 ± 198.4) s] and treadmill exercise posi-tive rate (64.00% vs.82.00% vs .92.00%) ,in group A ,B ,C respectively ;and ST depression extent of group C was significantly higher than that of group A [(2.4 ± 1.1) mV vs.(1.9 ± 0.8) mV] ,P＜0.05 or ＜0.01. Spearman correlation analysis indicated that treadmill exercise positive rate (myocardial ischemia rate ) was not significantly correlated with coronary stenotic degree (r＝3.425 , P＝0.126).Conclusion :Although treadmill exercise test pos-sesses important significance in diagnosis of myocardial ischemia ,but coronary stenotic degree is not correlated with myocardial ischemic degree .which should raise clinical attention