Bypass surgery:
Hope your grandmother improves. Your grandmother likely did have 3 vessels bypassed initially. Unfortunately, the vein
graftsBone graft
Bone graft harvest
Heart bypass surgery
Meniscal allograft transplantation
Skin graft used are more prone to closing than the arterial grafts used. Approximately 14% of vein grafts are closed when people leave the hospital following bypass surgery and around 90% are closed at 10 years. The arterial grafts do much better. It is likely that one of her vein grafts closed, and could not be detected during heart catheterization. I would discuss this with your doctor to see which graft is closed and he/she will likely have other medical recommendations.
Thanks for your question,
CCF-MD-KE