Medical Dictionary

tachycardia

noun tachy·car·dia \ˌtak-i-ˈkärd-ē-ə\

Medical Definition of TACHYCARDIA

:  relatively rapid heart action whether physiological (as after exercise) or pathological—see junctional tachycardia, paroxysmal tachycardia, sinus tachycardia, ventricular tachycardia; compare bradycardia
July 01, 2015
precarious Hear it
not certain, secure, or steady
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