hi, my mother is having balloons in her heart because her veins collapse and they cant use stents. how many is too many and if she keeps having mild heartaches, collapsing veins, how will the balloons do any good? She had major heart surgery 4 months ago, shes diabetic, and the dr said yesterday they could only do 1 stent because her liver was not strong enough. they want to put in 6, she already has 2 balloons.