Abstract:
OBJECTIVES:The aim of this multicenter study was to evaluate the safety of discontinuing oral anticoagulation therapy (OAT) after apparently successful pulmonary vein isolation. BACKGROUND:Atrial fibrillation (AF) is associated with an increased risk of thromboembolic events (TE) and often requires OAT. Pulmonary vein isolation is considered an effective treatment for AF. METHODS:We studied 3,355 patients, of whom 2,692 (79% male, mean age 57 +/- 11 years) discontinued OAT 3 to 6 months after ablation (Off-OAT group) and 663 (70% male, mean age 59 +/- 11 years) remained on OAT after this period (On-OAT group). CHADS(2) (congestive heart failure, hypertension, age [75 years and older], diabetes mellitus, and a history of stroke or transient ischemic attack) risk scores of 1 and > or =2 were recorded in 723 (27%) and 347 (13%) Off-OAT group patients and in 261 (39%) and 247 (37%) On-OAT group patients, respectively. RESULTS:During follow-up (mean 28 +/- 13 months vs. 24 +/- 15 months), 2 (0.07%) Off-OAT group patients and 3 (0.45%) On-OAT group patients had an ischemic stroke (p = 0.06). No other thromboembolic events occurred. No Off-OAT group patient with a CHADS(2) risk score of > or =2 had an ischemic stroke. A major hemorrhage was observed in 1 (0.04%) Off-OAT group patient and 13 (2%) On-OAT group patients (p < 0.0001). CONCLUSIONS:In this nonrandomized study, the risk-benefit ratio favored the suspension of OAT after successful AF ablation even in patients at moderate-high risk of TE. This conclusion needs to be confirmed by future large randomized trials.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Themistoclakis S,Corrado A,Marchlinski FE,Jais P,Zado E,Rossillo A,Di Biase L,Schweikert RA,Saliba WI,Horton R,Mohanty P,Patel D,Burkhardt DJ,Wazni OM,Bonso A,Callans DJ,Haissaguerre M,Raviele A,Natale Adoi
10.1016/j.jacc.2009.11.039subject
Has Abstractpub_date
2010-02-23 00:00:00pages
735-43issue
8eissn
0735-1097issn
1558-3597pii
S0735-1097(09)04080-7journal_volume
55pub_type
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