Thank you for posting your query.
I have noted your symptoms and treatment received so far.
I think you are on correct treatment and warfarin
should be continued for long to prevent any brain stroke
You could see your neurologist
I do not think that a bypass surgery
is needed, as you are doing so well on medical treatment.
I hope my answer helps. Please get back if you have any follow up queries or if you require any additional information.
Wishing you good health,
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad, India
Click on this link to ask me a DIRECT QUERY: http://bit.ly/Dr-Sudhir-kumar
My BLOG: http://bestneurodoctor.blogspot.in