Stroke due to atrial fibrillation in a population-based stroke registry (Ludwigshafen Stroke Study) CHADS2, CHA2DS2-VASc score, underuse of oral anticoagulation, and implications for preventive measures
Background and purpose Atrial fibrillation (AF) is amongst the most important etiologies of ischaemic stroke. In a population‐based stroke registry, we tested the hypothesis of low adherence to current guidelines as a main cause of high rates of AF‐associated stroke. Methods Within the Ludwigshafen...
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Published in | European journal of neurology Vol. 20; no. 1; pp. 117 - 123 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Blackwell Publishing Ltd
01.01.2013
John Wiley & Sons, Inc |
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Abstract | Background and purpose
Atrial fibrillation (AF) is amongst the most important etiologies of ischaemic stroke. In a population‐based stroke registry, we tested the hypothesis of low adherence to current guidelines as a main cause of high rates of AF‐associated stroke.
Methods
Within the Ludwigshafen Stroke Study (LuSSt), a prospective ongoing population‐based stroke register, we analyzed all patients with a first‐ever ischaemic stroke (FEIS) owing to AF in 2006 and 2007. We determined whether AF was diagnosed before stroke and assessed pre‐stroke CHADS2 and CHA2DS2‐VASc scores.
Results
In total, 187 of 626 patients with FEIS suffered from cardioembolic stroke owing to AF, which was newly diagnosed in 57 (31%) patients. Retrospective pre‐stroke risk stratification according to CHADS2 score indicated low/intermediate risk in 34 patients (18%) and high risk (CHADS2 ≥ 2) in 153 patients (82%). Application of CHA2DS2‐VASc score reduced number of patients at low/intermediate risk (CHA2DS2‐VASc score 0–1) to five patients (2.7%). In patients with a CHADS2 score ≥ 2 and known AF (n = 106) before stroke, 38 (36%) were on treatment with vitamin K antagonists on admission whilst only in 16 patients (15%) treatment was in therapeutic range.
Conclusions
Our study strongly supports the hypothesis that underuse of oral anticoagulants in high‐risk patients importantly contributes to AF‐associated stroke. CHA2DS2‐VASc score appears to be a more valuable risk stratification tool than CHADS2 score. Preventive measures should focus on optimizing pre‐stroke detection of AF and better implementation of present AF‐guidelines with respect to anticoagulation therapy. |
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AbstractList | Background and purpose
Atrial fibrillation (AF) is amongst the most important etiologies of ischaemic stroke. In a population‐based stroke registry, we tested the hypothesis of low adherence to current guidelines as a main cause of high rates of AF‐associated stroke.
Methods
Within the Ludwigshafen Stroke Study (LuSSt), a prospective ongoing population‐based stroke register, we analyzed all patients with a first‐ever ischaemic stroke (FEIS) owing to AF in 2006 and 2007. We determined whether AF was diagnosed before stroke and assessed pre‐stroke CHADS2 and CHA2DS2‐VASc scores.
Results
In total, 187 of 626 patients with FEIS suffered from cardioembolic stroke owing to AF, which was newly diagnosed in 57 (31%) patients. Retrospective pre‐stroke risk stratification according to CHADS2 score indicated low/intermediate risk in 34 patients (18%) and high risk (CHADS2 ≥ 2) in 153 patients (82%). Application of CHA2DS2‐VASc score reduced number of patients at low/intermediate risk (CHA2DS2‐VASc score 0–1) to five patients (2.7%). In patients with a CHADS2 score ≥ 2 and known AF (n = 106) before stroke, 38 (36%) were on treatment with vitamin K antagonists on admission whilst only in 16 patients (15%) treatment was in therapeutic range.
Conclusions
Our study strongly supports the hypothesis that underuse of oral anticoagulants in high‐risk patients importantly contributes to AF‐associated stroke. CHA2DS2‐VASc score appears to be a more valuable risk stratification tool than CHADS2 score. Preventive measures should focus on optimizing pre‐stroke detection of AF and better implementation of present AF‐guidelines with respect to anticoagulation therapy. Atrial fibrillation (AF) is amongst the most important etiologies of ischaemic stroke. In a population-based stroke registry, we tested the hypothesis of low adherence to current guidelines as a main cause of high rates of AF-associated stroke. Within the Ludwigshafen Stroke Study (LuSSt), a prospective ongoing population-based stroke register, we analyzed all patients with a first-ever ischaemic stroke (FEIS) owing to AF in 2006 and 2007. We determined whether AF was diagnosed before stroke and assessed pre-stroke CHADS2 and CHA2DS2-VASc scores. In total, 187 of 626 patients with FEIS suffered from cardioembolic stroke owing to AF, which was newly diagnosed in 57 (31%) patients. Retrospective pre-stroke risk stratification according to CHADS2 score indicated low/intermediate risk in 34 patients (18%) and high risk (CHADS2 greater than or equal to 2) in 153 patients (82%). Application of CHA2DS2-VASc score reduced number of patients at low/intermediate risk (CHA2DS2-VASc score 0-1) to five patients (2.7%). In patients with a CHADS2 score greater than or equal to 2 and known AF (n = 106) before stroke, 38 (36%) were on treatment with vitamin K antagonists on admission whilst only in 16 patients (15%) treatment was in therapeutic range. Our study strongly supports the hypothesis that underuse of oral anticoagulants in high-risk patients importantly contributes to AF-associated stroke. CHA2DS2-VASc score appears to be a more valuable risk stratification tool than CHADS2 score. Preventive measures should focus on optimizing pre-stroke detection of AF and better implementation of present AF-guidelines with respect to anticoagulation therapy. Background and purpose Atrial fibrillation (AF) is amongst the most important etiologies of ischaemic stroke. In a population-based stroke registry, we tested the hypothesis of low adherence to current guidelines as a main cause of high rates of AF-associated stroke. Methods Within the Ludwigshafen Stroke Study (LuSSt), a prospective ongoing population-based stroke register, we analyzed all patients with a first-ever ischaemic stroke (FEIS) owing to AF in 2006 and 2007. We determined whether AF was diagnosed before stroke and assessed pre-stroke CHADS2 and CHA2DS2-VASc scores. Results In total, 187 of 626 patients with FEIS suffered from cardioembolic stroke owing to AF, which was newly diagnosed in 57 (31%) patients. Retrospective pre-stroke risk stratification according to CHADS2 score indicated low/intermediate risk in 34 patients (18%) and high risk (CHADS2 ≥ 2) in 153 patients (82%). Application of CHA2DS2-VASc score reduced number of patients at low/intermediate risk (CHA2DS2-VASc score 0-1) to five patients (2.7%). In patients with a CHADS2 score ≥ 2 and known AF (n = 106) before stroke, 38 (36%) were on treatment with vitamin K antagonists on admission whilst only in 16 patients (15%) treatment was in therapeutic range. Conclusions Our study strongly supports the hypothesis that underuse of oral anticoagulants in high-risk patients importantly contributes to AF-associated stroke. CHA2DS2-VASc score appears to be a more valuable risk stratification tool than CHADS2 score. Preventive measures should focus on optimizing pre-stroke detection of AF and better implementation of present AF-guidelines with respect to anticoagulation therapy. [PUBLICATION ABSTRACT] |
Author | Urbanek, C. Becher, H. Palm, F. Dos Santos, M. Safer, A. Grau, A. J. Kleemann, T. Buggle, F. Hennerici, M. G. Zahn, R. |
Author_xml | – sequence: 1 givenname: F. surname: Palm fullname: Palm, F. email: palmf@klilu.de organization: Department of Neurology, Klinikum Ludwigshafen, Ludwigshafen, Germany – sequence: 2 givenname: T. surname: Kleemann fullname: Kleemann, T. organization: Department of Cardiology, Klinikum Ludwigshafen, Ludwigshafen, Germany – sequence: 3 givenname: M. surname: Dos Santos fullname: Dos Santos, M. organization: Department of Neurology, Klinikum Ludwigshafen, Ludwigshafen, Germany – sequence: 4 givenname: C. surname: Urbanek fullname: Urbanek, C. organization: Department of Neurology, Klinikum Ludwigshafen, Ludwigshafen, Germany – sequence: 5 givenname: F. surname: Buggle fullname: Buggle, F. organization: Department of Neurology, Klinikum Ludwigshafen, Ludwigshafen, Germany – sequence: 6 givenname: A. surname: Safer fullname: Safer, A. organization: Institute of Public Health, University of Heidelberg, Heidelberg, Germany – sequence: 7 givenname: M. G. surname: Hennerici fullname: Hennerici, M. G. organization: Department of Neurology, Universitätsklinikum Mannheim, University of Heidelberg, Mannheim, Germany – sequence: 8 givenname: H. surname: Becher fullname: Becher, H. organization: Institute of Public Health, University of Heidelberg, Heidelberg, Germany – sequence: 9 givenname: R. surname: Zahn fullname: Zahn, R. – sequence: 10 givenname: A. J. surname: Grau fullname: Grau, A. J. organization: Department of Neurology, Klinikum Ludwigshafen, Ludwigshafen, Germany |
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Definitions for use in a multicenter clinical trial. TOAST. Trial of Org 10172 in Acute Stroke Treatment publication-title: Stroke |
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Snippet | Background and purpose
Atrial fibrillation (AF) is amongst the most important etiologies of ischaemic stroke. In a population‐based stroke registry, we tested... Background and purpose Atrial fibrillation (AF) is amongst the most important etiologies of ischaemic stroke. In a population-based stroke registry, we tested... Atrial fibrillation (AF) is amongst the most important etiologies of ischaemic stroke. In a population-based stroke registry, we tested the hypothesis of low... |
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SubjectTerms | Antagonists Anticoagulants atrial fibrillation Cardiac arrhythmia cardioembolic stroke CHA2DS2-VASc score CHADS2 score Etiology Fibrillation Hypotheses Medical research oral anticoagulation Risk factors Risk groups Stroke Vitamin K |
Title | Stroke due to atrial fibrillation in a population-based stroke registry (Ludwigshafen Stroke Study) CHADS2, CHA2DS2-VASc score, underuse of oral anticoagulation, and implications for preventive measures |
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