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tachycardia

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tach⋅y⋅car⋅di⋅a

[tak-i-kahr-dee-uh]
–noun Medicine/Medical.
excessively rapid heartbeat.

Origin:
1885–90; tachy- + -cardia
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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tach·y·car·di·a   (tāk'ĭ-kär'dē-ə)   
n.  A rapid heart rate, especially one above 100 beats per minute in an adult.

[tachy- + Greek kardiā, heart; see cardia.]
tach'y·car'di·ac (-dē-āk) adj. & n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: tachy·car·dia
Pronunciation: "tak-i-'kärd-E-&
Function: noun
: relatively rapid heart action whether physiological (asafter exercise) or pathological —see JUNCTIONAL TACHYCARDIA, PAROXYSMAL TACHYCARDIA, SINUSTACHYCARDIA, VENTRICULAR TACHYCARDIA; —compare BRADYCARDIA
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

tachycardia tach·y·car·di·a (tāk'ĭ-kär'dē-ə)
n.
A rapid heart rate, especially one above 100 beats per minute in an adult. Also called tachyrhythmia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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