Value of Coronary Artery Calcium Score to Predict Severity or Complexity of Coronary Artery Disease

Background: Prediction of severity or complexity of coronary artery disease (CAD) is valuable owing to increased risk for cardiovascular events. Although the association between total coronary artery calcium (CAC) score and severity of CAD, Gensini score was not used, it has been previously demonstrated. There is no information about the association between total CAC score and complexity of CAD. Objectives: To investigate the association between severity or complexity of coronary artery disease (CAD) assessed by Gensini score and SYNTAX score (SS), respectively, and coronary artery calcium (CAC) score, which is a noninvasive method for CAD evaluation in symptomatic patients with accompanying significant CAD. Methods: Two-hundred-fourteen patients were enrolled. Total CAC score was obtained before angiography. Severity and complexity of CAD was assessed by Gensini score and SS, respectively. Associations between clinical and angiographic parameters and total CAC score were analyzed. Results: Median total CAC score was 192 (23.0-729.8), and this was positively correlated with both Gensini score (r: 0.299, p<0.001) and SS (r: 0.577, p<0.001). At multivariate analysis, it was independently associated with age (beta: 0.154, p: 0.027), male gender (beta: 0.126, p: 0.035) and SS (beta: 0.481, p<0.001). Receiver-operating characteristic (ROC) curve analysis revealed a cut-off value > 809 for SS > 32 (high SS tertile). Conclusion: In symptomatic patients with accompanying significant CAD, total CAC score was independently associated with SS and patients with SS > 32 may be detected through high Agatston score. (Arq Bras Cardiol. 2014; 102( 2): 120- 127)