Risk factors for thromboembolic and bleeding events in anticoagulated patients with atrial fibrillation: the prospective, multicentre observational PREvention oF thromboembolic events - European Registry in Atrial Fibrillation (PREFER in AF)
Language English Country England, Great Britain Media electronic
Document type Journal Article, Multicenter Study, Observational Study, Research Support, Non-U.S. Gov't
Grant support
CDF-2015-08-074
Department of Health - United Kingdom
PubMed
30928922
PubMed Central
PMC6475354
DOI
10.1136/bmjopen-2018-022478
PII: bmjopen-2018-022478
Knihovny.cz E-resources
- Keywords
- anticoagulation, atrial fibrillation, major bleeding, risk stratification, thromboembolism,
- MeSH
- Anticoagulants adverse effects therapeutic use MeSH
- Administration, Oral MeSH
- Stroke etiology prevention & control MeSH
- Atrial Fibrillation complications drug therapy MeSH
- Risk Assessment MeSH
- International Normalized Ratio MeSH
- Hemorrhage chemically induced epidemiology MeSH
- Middle Aged MeSH
- Humans MeSH
- Logistic Models MeSH
- Multivariate Analysis MeSH
- Follow-Up Studies MeSH
- Prospective Studies MeSH
- Registries MeSH
- Risk Factors MeSH
- Aged, 80 and over MeSH
- Aged MeSH
- Heart Failure epidemiology etiology MeSH
- Ischemic Attack, Transient epidemiology etiology MeSH
- Thromboembolism etiology prevention & control MeSH
- Check Tag
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Aged, 80 and over MeSH
- Aged MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Multicenter Study MeSH
- Observational Study MeSH
- Research Support, Non-U.S. Gov't MeSH
- Geographicals
- Europe epidemiology MeSH
- Names of Substances
- Anticoagulants MeSH
OBJECTIVES: We identified factors associated with thromboembolic and bleeding events in two contemporary cohorts of anticoagulated patients with atrial fibrillation (AF), treated with either vitamin K antagonists (VKA) or non-VKA oral anticoagulants (NOACs). DESIGN: Prospective, multicentre observational study. SETTING: 461 centres in seven European countries. PARTICIPANTS: 5310 patients receiving a VKA (PREvention oF thromboembolic events - European Registry in Atrial Fibrillation (PREFER in AF), derivation cohort) and 3156 patients receiving a NOAC (PREFER in AF Prolongation, validation cohort) for stroke prevention in AF. OUTCOME MEASURES: Risk factors for thromboembolic events (ischaemic stroke, systemic embolism) and major bleeding (gastrointestinal bleeding, intracerebral haemorrhage and other life-threatening bleeding). RESULTS: The mean age of patients enrolled in the PREFER in AF registry was 72±10 years, 40% were female and the mean CHA2DS2-VASc Score was 3.5±1.7. The incidence of thromboembolic and major bleeding events was 2.34% (95% CI 1.93% to 2.74%) and 2.84% (95% CI 2.41% to 3.33%) after 1-year of follow-up, respectively.Abnormal liver function, prior stroke or transient ischaemic attack, labile international normalised ratio (INR), concomitant therapy with antiplatelet or non-steroidal anti-inflammatory drugs, heart failure and older age (≥75 years) were independently associated with both thromboembolic and major bleeding events.With the exception of unstable INR values, these risk factors were validated in patients treated with NOACs (PREFER in AF Prolongation Study, 72±9 years, 40% female, CHA2DS2-VASc 3.3±1.6). For each single point decrease on a modifiable bleeding risk scale we observed a 30% lower risk for major bleeding events (OR 0.70, 95% CI 0.64 to 0.76, p<0.01) and a 28% lower rate of thromboembolic events (OR 0.72, 95% CI 0.66 to 0.82, p<0.01). CONCLUSION: Attending to modifiable risk factors is an important treatment target in anticoagulated AF patients to reduce thromboembolic and bleeding events. Initiation of anticoagulation in those at risk of stroke should not be prevented by elevated bleeding risk scores.
3rd Medical Department Cardiology and Intensive Care Medicine Wilhelminen Hospital Vienna Austria
Cardiology Medical Faculty Pilsen Charles University Pilsen Czech Republic
Cardiology Sigmund Freud University Medical School Vienna Austria
Daiichi Sankyo Europe Munich Germany
Department of Cardiology Medical University of Vienna Vienna Austria
Department of Cardiology St Bartholomew's Hospital London UK
Department of Cardiovascular Sciences Campus Bio Medico University of Rome Rome Italy
Institute for Cardiometabolic Diseases Karl Landsteiner Society St Pölten Austria
University of Pisa and Division of Cardiology Pisa University Hospital Pisa Italy
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