Value of CHA2DS2-VASc Score for Prediction and Ruling Out of Acute Stent Thrombosis After Primary Percutaneous Coronary Intervention

Acute stent thrombosis is an important complication of stent implantation. The CHA2DS2-VASc (congestive heart failure, hypertension, age >= 75 years, diabetes mellitus, previous stroke, vascular disease, age between 65 and 74 years, female gender) score incorporates important cardiovascular (CV) risk factors and predicts prognosis in various CV conditions. We evaluated the value of the CHA2DS2-VASc score in predicting acute stent thrombosis (ie, thrombosis during 24 hours after stent placement) in patients undergoing primary percutaneous intervention for ST-segment elevated myocardial infarction. Patients with intraprocedural stent thrombosis and complications were excluded; 48 (2.1%) of 2732 patients had acute stent thrombosis according to our definition. Median CHA2DS2-VASc score was significantly higher in this stent thrombosis group. Cumulative acute stent thrombosis rates were 0.51% for CHA2DS2-VASc score <= 1, 1.55% for <= 2, 1.80% for <= 3, 2.00% for <= 4, 2.17% for <= 5, and 2.19% for <= 6. The CHA2DS2-VASc score (odds ratio = 1.390, 95% confidence interval = 1.118-1.728; P = .003) was an independent predictor of acute stent thrombosis. The CHA2DS2-VASc score <= 1 predicted the absence of the acute stent thrombosis with 91% specificity and 36% sensitivity. Further studies are needed to establish the value of this finding in the context of current clinical practice.