Abstract：Objective To investigate the diagnostic value of Saah electrocardiogram (Saah ECG) for stable coronary artery disease(SCAD). Methods We selected 75 inpatients with suspected SCAD. Their SaahECG was recorded before coronary angiography(CAG) examination. According to the CAG results, those patients with main branches of coronary artery stenosis≥50% were classified into CAG positive group (n=42) while those with coronary artery stenosis＜50% were classified into CAG negative group (n=33). Ri interval, Rt interval and Ri/Rt of SaahECG were calculated respectively. ResultsIn the diagnosis of SCAD, the sensitivity and specificity of Saah ECG is separately 80.9% and 81.8%, the positive and negative predictive value is separately 85.0% and 77.1%, and the positive and negative likelihood ratio is 4.445 and 0.233, respectively. The Ri/Rt ratio of CAG positive group is significantly higher than that of CAG negative group ［(1.216±0.329) vs. (0.820±0.309),P＜0.05］. Conclusion SaahECG has relatively high clinical application value for the diagnosis of SCAD. It is expected to become an important examination method for the diagnosis of coronary heart disease.
