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Original Article   Low-Dose Aspirin for Preventing Recurrent Venous Thromboembolism Original Article   Low-Dose Aspirin for Preventing Recurrent Venous Thromboembolism

Original Article Low-Dose Aspirin for Preventing Recurrent Venous Thromboembolism - PowerPoint Presentation

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Original Article Low-Dose Aspirin for Preventing Recurrent Venous Thromboembolism - PPT Presentation

Original Article LowDose Aspirin for Preventing Recurrent Venous Thromboembolism Timothy A Brighton MB BS John W Eikelboom MB BS Kristy Mann MBiostat Rebecca Mister MSc Alexander Gallus MB BS Paul Ockelford MB Harry Gibbs MB Wendy Hague PhD Deni ID: 764418

aspirin venous dose thromboembolism venous aspirin thromboembolism dose recurrent preventing patients unprovoked study 1979 367 2012 brighton engl initial

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Original Article Low-Dose Aspirin for Preventing Recurrent Venous Thromboembolism Timothy A. Brighton, M.B., B.S., John W. Eikelboom, M.B., B.S., Kristy Mann, M.Biostat., Rebecca Mister, M.Sc., Alexander Gallus, M.B., B.S., Paul Ockelford, M.B., Harry Gibbs, M.B., Wendy Hague, Ph.D., Denis Xavier, M.Sc., Rafael Diaz, M.D., Adrienne Kirby, M.Sc., John Simes, M.D., for the ASPIRE Investigators N Engl J MedVolume 367(21):1979-1987November 22, 2012

Low-Dose Aspirin for Preventing Recurrent Venous Thromboembolism Objective - To evaluate the efficacy of low-dose aspirin, as compared with placebo, in preventing a recurrence of venous thromboembolism in patients who had completed initial anticoagulation with warfarin after a first unprovoked episode of venous thromboembolism.

Low-Dose Aspirin for Preventing Recurrent Venous ThromboembolismBackground Patients who have had a first episode of unprovoked venous thromboembolism have a high risk of recurrence after anticoagulants are discontinued. Aspirin may be effective in preventing a recurrence of venous thromboembolism.

Low-Dose Aspirin for Preventing Recurrent Venous ThromboembolismMethodsThe Aspirin to Prevent Recurrent Venous Thromboembolism (ASPIRE) study was a double-blind, randomized, placebo-controlled study of the use of low-dose aspirin in patients who had had a first ever unprovoked venous thromboembolism and who had completed initial anticoagulation therapy.Randomly assigned 822 patients who had completed initial anticoagulant therapy after a first episode of unprovoked venous thromboembolism to receive aspirin, at a dose of 100 mg daily, or placebo for up to 4 years.

Low-Dose Aspirin for Preventing Recurrent Venous ThromboembolismPopulation822 patients, including 447 men(54%)Median age was 54 years36% had a BMI of 30 or higher 15% reported a first-degree relative had had a venous thromboembolism5% had a prior provoked venous thromboembolism2% had active cancer(with non-melonoma skin cancer not included

Risks of First Recurrent Venous Thromboembolism and Major Vascular Events. Brighton TA et al. N Engl J Med 2012;367:1979-1987

Hazard Ratios for Venous Thromboembolism, Major Vascular Events, and Clinically Relevant Bleeding. Brighton TA et al. N Engl J Med 2012;367:1979-1987

Baseline Characteristics of the Patients. Brighton TA et al. N Engl J Med 2012;367:1979-1987

Outcome Events, According to Study Group. Brighton TA et al. N Engl J Med 2012;367:1979-1987

Conclusions In this study, aspirin, as compared with placebo, did not significantly reduce the rate of recurrence of venous thromboembolism but resulted in a significant reduction in the rate of major vascular events, with improved net clinical benefit.These results substantiate earlier evidence of a therapeutic benefit of aspirin when it is given to patients after initial anticoagulant therapy for a first episode of unprovoked venous thromboembolism.

Low-Dose Aspirin for Preventing Recurrent Venous ThromboembolismStrengths/LimitationsThe study included pts that had a prior provoked VTE and active malignancy, which makes it difficult to determine if this was indeed an unprovoked VTEThere was no mention that pts with a recurrent PE had any comparative imaging to determine if there was new clot burden vs residual thrombus ASPIRE trial results were pooled with the Warfarin and Aspirin(WARFASA) trial as concurrent cohort studies