The best replacement for stents is bypass.

The best alternatives to stents are rated as following:
★★★★★  bypass
★★★★  medication
★★★★  bypass surgery
★★★★  open heart surgery
★★★  cabg
★  drugs
★  stints
★  angioplasty
★  surgery
★  shunts
★  balloons
★  heart bypass surgery
  open heart
  heart bypass
  drug therapy
  by-pass surgery
  unmedicated stents
  non medicated
  non coated stents

Your alternative for stents is not listed? Suggest!
Speaking about stents, one probably shouldn't forget about plavix.

Other search terms related to stents and their ratings are:

★★★★★ plavix
★★★★★ kidney stone removal
★★★ mri
★★ pci
You have in mind a companion for stents and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of stents in all years. Click on graph for more.