Cost-Effectiveness Study on Establishing a Warfarin Counseling Clinic for Egyptian Patients With Mitral Valve Prostheses

All patients or their caregivers will receive twenty minutes educational sessions for the first three visits according to patient ability to understand. At subsequent visits along the study duration, we will briefly review our educational material to refresh the patient's information. This will include: The objectives of treatment, disease progression process, risk factors, common symptoms of bleeding/thrombotic events and how to deal with this. Lifestyle modifications, including smoking cessation, blood pressure and diabetes control. Drug information: drug action, dose, indication, possible side effects, how to deal with the side effects, actions to take when missing the dose, storage conditions and when and how to administer. Possible interactions including drug-drug and drug-food interactions. Target INR and INR monitoring