Document Detail

Inherited factor XI deficiency confers no protection against acute myocardial infarction.
MedLine Citation:
PMID:  12871398     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND PURPOSE: Factor XI (FXI) contributes to thrombin generation thereby affecting fibrin formation and to down regulation of fibrinolysis by activation of thrombin-activatable fibrinolysis inhibitor (TAFI). The purpose of this study was to evaluate whether patients with severe FXI deficiency are protected against acute myocardial infarction (AMI). METHODS: The incidence of AMI in patients with severe FXI deficiency (FXI activity less than 15 U dL(-1)) whose age was 35 years or more was compared to the incidence of AMI in age and gender matched persons of the general population. Atherosclerotic risk factors were assessed in FXI deficient patients and blood was tested for prothrombotic parameters such as FV Leiden, prothrombin G20210A, lupus anticoagulant, and platelet membrane polymorphisms. The common mutations causing FXI deficiency in Jews were also examined. RESULTS: Of 96 patients with severe FXI deficiency (55 women and 41 men) 16 had a history of AMI (6 women and 10 men). The median age at the time of AMI was 64.5 for women and 58 for men. The calculated annual rate of AMI in men was similar to the expected in the general Israeli population, whereas in women it was almost 2-fold higher, but this difference did not reach statistical significance. One or more atherosclerotic risk factors were observed in 13 of 16 patients (81.3%) with AMI compared to 44 of 79 patients (55.7%) without AMI (P < 0.001). The frequency distributions of platelet polymorphisms and of prothrombotic polymorphisms were not different between patients with severe FXI deficiency who experienced or not an AMI. None of the patients had lupus anticoagulant. The common genotypes which cause FXI deficiency in Jews were similarly distributed in patients with and without AMI. CONCLUSIONS: Severe FXI deficiency does not confer protection against AMI.
O Salomon; D M Steinberg; R Dardik; N Rosenberg; A Zivelin; I Tamarin; B Ravid; S Berliner; U Seligsohn
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of thrombosis and haemostasis : JTH     Volume:  1     ISSN:  1538-7933     ISO Abbreviation:  J. Thromb. Haemost.     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-07-21     Completed Date:  2003-11-04     Revised Date:  2006-11-07    
Medline Journal Info:
Nlm Unique ID:  101170508     Medline TA:  J Thromb Haemost     Country:  England    
Other Details:
Languages:  eng     Pagination:  658-61     Citation Subset:  IM    
Institute of Thrombosis and Hemostasis, Sheba Medical Center, Tel Hashomer and Sackler Faculty of Medicine, Tel Aviv, Israel.
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MeSH Terms
Age Distribution
Aged, 80 and over
Arteriosclerosis / epidemiology,  genetics
Factor XI Deficiency / epidemiology*,  genetics
Family Health
Israel / epidemiology
Middle Aged
Myocardial Infarction / epidemiology*,  genetics
Platelet Membrane Glycoproteins / genetics
Polymorphism, Genetic
Risk Factors
Thrombophilia / epidemiology,  genetics
Reg. No./Substance:
0/Platelet Membrane Glycoproteins

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