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Published on: February 26, 2013
Left Atrial Dimension and CHA2DS2-VASc Score in Predicting Stroke in Patients with Rheumatic Atrial Fibrillation
Sheng-Nan Chang1, Chih-Hsien Wang2, Yoga Waranugraha3,4
1Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital Yun-Lin Branch, Yun-Lin, Taiwan.
Insights
Rheumatic atrial fibrillation (AF) patients face higher stroke risks. The CHA2DS2-VASc-LA score may improve stroke risk assessment in this population, offering better prediction than the standard CHA2DS2-VASc score.
Area of Science:
- Cardiology
- Stroke Prevention
- Atrial Fibrillation Research
Background:
- Rheumatic atrial fibrillation (AF) patients have an increased risk of stroke.
- Identifying accurate risk factors for stroke in this population is crucial.
- Existing risk scores may not fully capture the stroke risk in rheumatic AF.
Purpose of the Study:
- To evaluate the predictive performance of the CHA2DS2-VASc score for stroke events in rheumatic AF patients.
- To explore enhancements to the CHA2DS2-VASc score for improved stroke risk prediction in Asian populations.
- To compare the predictive accuracy between rheumatic AF and nonvalvular AF.
Main Methods:
- A retrospective cohort study of 29,341 AF patients from March 2010 to December 2020.
- Included 1,942 patients with rheumatic AF, assessing ischemic stroke as the endpoint.
- Utilized the area under the receiver operating characteristic curve (AUC) to evaluate the CHA2DS2-VASc score's performance.
Main Results:
- Rheumatic AF patients had a higher stroke incidence than nonvalvular AF patients (P=0.048).
- The CHA2DS2-VASc score showed lower predictive accuracy in rheumatic AF (AUC=0.693) compared to nonvalvular AF (AUC=0.746).
- Integrating left atrial (LA) dimension improved AUC for rheumatic AF (0.707), correlating with stroke incidence (P=0.012).
Conclusions:
- Rheumatic AF patients exhibit a significantly higher stroke risk.
- The CHA2DS2-VASc-LA score demonstrates potential for enhanced stroke risk assessment in rheumatic AF.
- Further validation of the CHA2DS2-VASc-LA score is warranted for clinical application.
Background:
Rheumatic atrial fibrillation (AF) patients are at an elevated risk of stroke events, yet the associated risk factors remain unclear.
Objectives:
This study aimed to evaluate the effectiveness of the CHA2DS2-VASc score in predicting stroke events in rheumatic AF patients and explore potential enhancements for increased predicting accuracy in the Asian population, comparing it to nonvalvular AF.
Methods:
A retrospective cohort study spanning March 2010 to December 2020 included 29,341 AF patients followed up for up to 10 years, with 1,942 identified as having rheumatic AF. The CHA2DS2-VASc score was computed for all patients. Using the area under the receiver operating characteristic curve (AUC), we evaluated the performance of the predictive model. The clinical endpoint was ischemic stroke.
Results:
Rheumatic AF patients exhibited a higher stroke incidence than nonvalvular AF patients (log-rank P = 0.048). While the CHA2DS2-VASc score predicted stroke events in rheumatic AF, its AUC was lower than in nonvalvular AF (0.693 vs 0.746, P < 0.001). Integrating left atrial (LA) dimension information showed a trend toward an increased AUC for rheumatic AF to 0.707 (P = 0.068), but not for nonvalvular AF (AUC: 0.734 with LA, P = 0.744). The CHA2DS2-VASc-LA score showed a robust correlation with the annual incidence of ischemic stroke in rheumatic AF patients (P = 0.012 for trend).
Conclusions:
Rheumatic AF patients have a higher stroke risk than nonrheumatic AF and CHA2DS2-VASc-LA score might improve stroke risk assessment in this population.
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