Sir My Mother 76 has Rheumatic Heart Disease,having MS (area 1.2),moderate TR,moderatePAS(PASP-50mmhg) ModerateAR no AS,LVEF 60./.,No clots ,no vegitation.we found out htat She has MS during normal check up.she is asymptomatic to these .her digoxin level is 0.6.recently doctor has put her on ACITROM 1mg and says that it is required for future prevention of clotting.For last 12 years she is doing fine.She is also on bp medicine rewas am 2.5mg 1-0-1,and zoryl1m 1-0-0(for sugar).she is also taking frusilec 1/2 tab alternate day and lanoxin .25 mg for 5 days in a week.kindly guide me if acitrom1 is required and safe and wheather it can cause any problem in future .please help me as i lost my father recently and i want her to give best treatment.