The best replacement for tachycardia is bradycardia.

The best alternatives to tachycardia are rated as following:
★★★★★  bradycardia
★★★  atrial fibrillation
★★★  svt
★★  supraventricular tachycardia
★★  sinus tachycardia
★★  ventricular tachycardia
★  ventricular fibrillation
★  fibrillation
★  arrhythmia
★  palpitations
★  atrial flutter
★  tachypnea
★  atrial tachycardia
★  panic attacks
  tachyarrhythmia
  psvt
  afib
  pvcs
  tachycardia
  hypotension

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

Other search terms related to tachycardia and their ratings are:
★★★★★ hypertension
★★★★★ hypotension
★★★★ pvc
★★★★ ectopy
★★★ low blood pressure
★★ normal blood pressure
★★ arrhythmia
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You have in mind a companion for tachycardia and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tachycardia in all years. Click on graph for more.
tachycardia
bradycardia
atrial fibrillation