RESUMEN
To explore diagnostic significance of treadmill exercise test (TET) combined echocardiography (ECG) for coronary heart disease (CHD) and its severity .Methods :Clinical data of 400 patients who were initially diagnosed as CHD were retrospectively analyzed .With coronary angiography as gold standard ,sensitivities and spe‐cificities of single TET ,single ECG and TET + ECG ,and positive detection rate of different number of diseased vessels were analyzed .Results : Compared with single TET and single ECG ,there was significant reduction in sensi‐tivity (80.67%,68. 07% vs.54.20%) and significant rise in specificity (74.07%,64.82% vs.90.74%) in TET +ECG , P＜0. 01 all.Along with number of diseased coronary vessels rose ,positive detection rates of single TET ,sin‐gle ECG and TET + ECG increased .Compared with single TET and single ECG ,there were significant rise ? In positive detection rates of single vessel coronary disease (72. 32%,56. 25% vs.83.93%) ,double vessel coronary disease (85. 92%,71. 83% vs.97. 18%) and multi vessel coronary disease (90. 91%, 87.27% vs.98. 18%) in TET+ ECG , P＜0.05 or ＜0. 01. Conclusion :Diagnostic specificity of TET + ECG is significantly better than those of single TET and single ECG ;when number of diseased coronary vessels gets more ,positive detection rate of TET +ECG is more significant .