Document Detail

Plasma von Willebrand Factor Levels Are an Independent Risk Factor for Adverse Events Including Mortality and Major Bleeding in Anticoagulated Atrial Fibrillation Patients.
MedLine Citation:
PMID:  21497043     Owner:  NLM     Status:  Publisher    
OBJECTIVES: In nonanticoagulated atrial fibrillation (AF) patients, plasma von Willebrand factor (vWF) levels have been related to stroke and vascular events. There are limited data on the prognostic role of biomarkers in anticoagulated AF patients in relation to adverse events (including thromboembolism), mortality, and major bleeding. We evaluated the prognostic value of plasma vWF levels and fibrin d-dimer in a large cohort of anticoagulated permanent AF patients. METHODS: We studied 829 patients (50% male; median age 76 years) with permanent AF who were stabilized (for at least 6 months) on oral anticoagulation therapy (international normalized ratio: 2.0 to 3.0). Plasma d-dimer and vWF levels were quantified by enzyme-linked immunosorbent assay. Patients were followed for 2 years, and adverse events (thrombotic and vascular events, mortality, and major bleeding) were recorded. RESULTS: Patients were followed for a median of 828 days (range 18 to 1,085 days). On multivariate analysis, age 75 years and older, previous stroke, heart failure, and high plasma vWF levels (≥221 IU/dl) were associated with future adverse cardiovascular events (all p values <0.05). High plasma vWF levels, elderly patients, diabetes, hypercholesterolemia, and current smoking were associated with mortality (all p values <0.05). High plasma vWF levels were also an independent predictor of major bleeding (hazard ratio: 4.47, 95% confidence interval: 1.86 to 10.75; p < 0.001). High plasma vWF levels were able to refine clinical risk stratification schema for stroke (CHADS(2) [Congestive heart failure, Hypertension, Age ≥75, Diabetes mellitus, and prior Stroke or transient ischemic attack (doubled)], CHA(2)DS(2)-VASc [Congestive heart failure, Hypertension, Age ≥75 years, Diabetes mellitus, Stroke, Vascular disease, Age 65 to 74 years, Sex category]) and bleeding (HAS-BLED [Hypertension, Abnormal renal/liver function, Stroke, Bleeding history or predisposition, Labile International Normalized Ratio, Elderly, Drugs/alcohol concomitantly]). d-dimer did not show any significant impact on adverse events. CONCLUSIONS: High plasma vWF levels (≥221 IU/dl) are an independent risk factor for adverse events in anticoagulated permanent AF patients. This biomarker may potentially be used to refine stroke and bleeding clinical risk stratification in AF.
Vanessa Roldán; Francisco Marín; Begoña Muiña; Jose Miguel Torregrosa; Diana Hernández-Romero; Mariano Valdés; Vicente Vicente; Gregory Y H Lip
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-11
Journal Detail:
Title:  Journal of the American College of Cardiology     Volume:  -     ISSN:  1558-3597     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8301365     Medline TA:  J Am Coll Cardiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.
Hematology and Medical Oncology Unit, Hospital Universitario Morales Meseguer, University of Murcia, Murcia, Spain.
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