tachycardia


tachy·car·dia

noun \ˌta-ki-ˈkär-dē-ə\

Definition of TACHYCARDIA

:  relatively rapid heart action whether physiological (as after exercise) or pathological — compare bradycardia

Origin of TACHYCARDIA

New Latin
First Known Use: 1889

tachy·car·dia

noun \ˌtak-i-ˈkärd-ē-ə\   (Medical Dictionary)

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

tachycardia

noun    (Concise Encyclopedia)

Heart rate over 100 (as high as 240) beats per minute. When it is a normal response to exercise or stress, it is no danger to healthy people, but when it originates elsewhere, it is an arrhythmia. Symptoms include fatigue, faintness, shortness of breath, and feeling the heart thumping. It may subside within minutes or hours with no lasting ill effects, but in serious heart, lung, or circulatory disease it can precede atrial fibrillation or heart attack and demands immediate medical attention. Tachycardias can be treated by an electric shock to the heart, by antiarrhythmic drugs, and by pacemakers.

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