Yes, you are right. The blue color bruises on the body of your mother is due to acitrom
. INR of 1.2 was low considering Double valve replacement
and there were increased chnces of blockage of the heart valves at 1.2 INR, as blood is thick at this INR.
So your doctor increased the dose, but I think it has caused the thinning of blood too much than required. you need to repeat your INR test immediately and consult a doctor in emergency.
Hope this answer would have helped you.
Dr. Atif Nazir