Mother in law has atrial fibrillation but cannot handle blood thinners( they cause her bleeding issues). what else can treat atrial fib besides blood thinners?

Ablation: she can be seen by a EP cardiologist to be evaluated for atrial ablation. she may or may not be a good candidate. also based on her risk factors rate control with B-blockers (IE metoprolol) may suffice as a proper treatment for A fibrilation.

Prevention/treatment: Blood thinners are used mainly for stroke prevention in patients with atrial fibrillation. There are numerous proposed personal scores/scales based on which they are recommended. The bleeding risk is usually the limiting factor in the use of blood thinners. Atrial fibrillation treatment is a different topic and it involves mainly controlling the heart rate/ heart rhythm.

Quite a few!: without directly reviewing the patients full history, labs, etc. I cannot give specific medical advice BUT there has been an entirely new group of treatments and might be less risky for some patients. https://www.heart.org/HEARTORG/Conditions/Arrhythmia/AboutArrhythmia/Atrial-Fibrillation-Medications_UCM_423781_Article.jsp dabigitran.