KnowraTachycardiaLinked fromLinked fromThe 6 pages that link to Tachycardia, each with the reason it gives.All 6Broader topic 1Related 3Compared with 2BradycardiaCompared with: It is the rate-direction opposite of bradycardia.PalpitationsCompared with: A fast measured rate is one possible cause of palpitations, not their definition.