CHA₂DS₂-VASc Score in the Prediction of Ischemic Stroke in Patients after Radiofrequency Catheter Ablation of Typical Atrial Flutter

Figures

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  Fig. 1. Flow chart of the study population. *6 patients had VHD and AF, †2 patients had VHD, AF, and dilated cardiomyopathy, ‡1 patient had AF and hypertrophic cardiomyopathy. AFL, atrial flutter; AF, atrial fibrillation; VHD, valvular heart disease.

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  Fig. 2. Graded increase in incidence of stroke by CHA2DS2-VASc score. CHA2DS2-VASc score, congestive heart failure, hypertension, age, diabetes mellitus, history of stroke or transient ischemic attack score, vascular disease and sex category.

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  Fig. 3. ROC curve for CHA2DS2-VASc score predicting ischemic stroke after AFL ablation. The AUC for CHA2DS2-VASc score for predicting event was 0.798. At a best cutoff of 2, the sensitivity and specificity for stroke event were 83.3% and 67.6%, respectively. AUC, area under the curve; CHA2DS2-VASc score, congestive heart failure, hypertension, age, diabetes mellitus, history of stroke or transient ischemic attack score, vascular disease and sex category; ROC, receiver operating characteristic.

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  Fig. 4. Stroke free survival curves for patients with different CHA2DS2-VASc scores. Kaplan-Meier survival analysis demonstrated that patients with a CHA2DS2-VASc scores ≥2 had a higher event rate compared with patients with a CHA2DS2-VASc score <2 (14.4% vs. 1.6%, p<0.001). CHA2DS2-VASc score, congestive heart failure, hypertension, age, diabetes mellitus, history of stroke or transient ischemic attack score, vascular disease and sex category.