Relationship Between Duke Treadmill Score and Severity of CAD in Suspected Patients

Nowadays, cardiovascular disease, including coronary artery disease, is the leading cause of death around the world. Duke Treadmill Score (DTS) is used as a prognostic score for patients suspected of coronary artery disease. Investigating the Relationship between DTS and syntax score (SxScore) as an indicator of complexity and severity of coronary artery disease in patients with intermediate and high Duke Score. This cross-sectional study was conducted at the exercise test unit of Heshmat Hospital in Rasht from September 2017 to December 2018. Among 1033 patients that passed exercise cardiac stress testing (EST), 118 patients who had positive exercise testing for CAD were enrolled. Coronary angiography was performed, and SxScore, a marker of CAD complexity, was determined. The relationship between DTS and SxScore was then evaluated. The data were analyzed by SPSS version 21. The risk of positive EST raised age more than 61 years (OR=1.072; 95%; CI=1.046-1.099), Hypertension (OR=3.235; 95%; CI=2.097-4.992), Hyperlipidemia (OR=2.109; 95%; CI=1.371-3.242) and Diabetes Mellitus (OR=2.15; CI=1.22-3.14). The presence of the following factors reduced positive EST: female (OR=0.377;95%; CI=0.133-1.068), retired (OR=0.128;95%; CI=0.045-0.361). The results of the present study showed that there was no significant difference between the degree of coronary artery involvement based on syntax with Duke scores (P=0.328). Although both DTS and Syntax scores are useful in evaluating coronary artery disease, there isn't a significant relationship between these scores, and they don't coincide. In other words, we cannot use DTS to predict the Syntax score.