The best replacement for cardioversion is ablation.

The best alternatives to cardioversion are rated as following:
★★★★★  ablation
★★★  defibrillation
★★★  defib
★★  pacing
★  rate control
★  cardiac ablation
★  shock
★  defibrillator
  unsynchronized cardioversion
  catheter ablation
  adenosine
  electrophysiology study catheter ablation
  monophasic
  transcutaneous pacing
  asynchronous
  unsynchronized

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

Other search terms related to cardioversion and their ratings are:
★★★★★ tee
★★ tee cpt code
★ amiodarone
ibutilide
You have in mind a companion for cardioversion and it is not yet here? Propose!



Google Trends

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