Randomized On-X Anticoagulation Trial

Brief description of study

Various patient groups with the On-X Valve can be maintained safely on lower doses of blood thinner(Coumadin®) or on antiplatelet drugs (aspirin/Plavix®) only rather than the standard dose of Coumadin and aspirin presently recommended by ACC/AHA or ACCP professional societies.

Clinical Study Identifier: NCT00291525

Detailed Study Description

This is a longitudinal, randomized (randomization to occur at the 3 month follow-up) study comparing the On-X valve on low dose anticoagulation (test group) to concomitant control groups of On-X valves receiving standard Coumadin/aspirin therapy, and also to FDA objective performance criteria (OPC) for heart valve replacement. It is a multicenter study consisting of 20 centers in the United States enrolling no more than 1200 patients (200 in each of 6 groups). There are three test arms of the study: low risk aortic valve replacement, high risk aortic valve replacement and mitral valve replacement. Each arm has an equivalent control. Test therapies are: low risk aortic valve replacement - aspirin/Plavix, high risk aortic valve replacement - Coumadin at INR of 1.5 to 2.0 plus aspirin, and mitral valve replacement - Coumadin at an INR of 2.0 to 2.5 plus aspirin. Follow-up will run for 5 years in each patient.

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