Abstract 17109: Clinical Usefulness of the Syntax Score to Predict Procedural Successes in Patients with Chronic Total Coronary Occlusion
Purpose: The SYNTAX score is a current angiographic tool grading the complexity of coronary artery disease. Previous studies have shown that, in multivessel coronary disease included left main stenosis, patients with higher score is strongly associated with a poor prognosis after percutaneous coronary intervention (PCI). However, the ability of the SYNTAX score for patients with chronic total coronary occlusion (CTO) undergoing PCI still remains unclear.
Methods: This retrospective study included 225 consecutive patients with CTO lesions that underwent PCI from 5 heart centers in Japan. The SYNTAX score was assessed with angiogram before PCI by 2 cardiologists. Primary endpoint was procedural success that coronary flow was obtained the TIMI-3. The secondary endpoints were total radiation time, dose, and total contrast media.
Results: Mean age was 67±10 years. Lesions of CTO were right coronary (48%) and left coronary (52%) arteries. Mean SYNTAX score was 26.7±12.4. Mean total radiation time and dose were 69.8±39.5 min and 3144±1906 mGy, respectively. Total contrast media was 201±77ml. The rate of procedural success was 83.6%. The SYNTAX score was significantly higher in patients of procedural failure compared with those of procedural success (32.7±12.0 vs. 25.6±12.6, p = 0.0013). Radiation time was also significantly high in patients with procedural failure. (105.4±32.2 min vs. 62.7±36.9 min, p < 0.0001). The SYNTAX score was also correlated with the total radiation time (below the figure).
Conclusions: In patients with CTO undergoing PCI, the SYNTAX score has a predictive ability of procedural success. Furthermore, the score may be useful for clinical decision making for CTO patients to prevent PCI-related procedural complications.
- © 2012 by American Heart Association, Inc.