Age as a risk factor for stroke in atrial fibrillation patients: implications for thromboprophylaxis.

Abstract:

:The prevalence of atrial fibrillation (AF) is related to age and is projected to rise exponentially as the population ages and the prevalence of cardiovascular risk factors increases. The risk of ischemic stroke is significantly increased in AF patients, and there is evidence of a graded increased risk of stroke associated with advancing age. Oral anticoagulation (OAC) is far more effective than antiplatelet agents at reducing stroke risk in patients with AF. Therefore, increasing numbers of elderly patients are candidates for, and could benefit from, the use of anticoagulants. However, elderly people with AF are less likely to receive OAC therapy. This is mainly due to concerns about a higher risk of OAC-associated hemorrhage in the elderly population. Until recently, older patients were under-represented in randomized controlled trials of OAC versus placebo or antiplatelet therapy, and therefore the evidence base for the value of OAC in the elderly population was not known. However, analyses of the available trial data indicate that the expected net clinical benefit of warfarin therapy is highest among patients with the highest untreated risk for stroke, which includes the oldest age category. An important caveat with warfarin treatment is maintenance of a therapeutic international normalized ratio, regardless of the age of the patient, where time in therapeutic range should be > or =65%. Therefore, age alone should not prevent prescription of OAC in elderly patients, given an appropriate stroke and bleeding risk stratification.

journal_name

J Am Coll Cardiol

authors

Marinigh R,Lip GY,Fiotti N,Giansante C,Lane DA

doi

10.1016/j.jacc.2010.05.028

subject

Has Abstract

pub_date

2010-09-07 00:00:00

pages

827-37

issue

11

eissn

0735-1097

issn

1558-3597

pii

S0735-1097(10)02415-0

journal_volume

56

pub_type

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