quinidine

quinidine

[kwin-i-deen, -din]
noun Pharmacology.
a colorless, crystalline alkaloid, C 2 0 H 2 4 N 2 O 2 , isomeric with quinine, obtained from the bark of certain species of cinchona trees or shrubs, used chiefly to regulate heart rhythm and to treat malaria.

Origin:
1830–40; quin(ine) + -id3 + -ine2

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Collins
World English Dictionary
quinidine (ˈkwɪnɪˌdiːn)
 
n
a crystalline alkaloid drug that is an optically active diastereoisomer of quinine: used to treat heart arrhythmias. Formula: C20H24N2O2

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

quinidine quin·i·dine (kwĭn'ĭ-dēn')
n.
A colorless crystalline alkaloid that is a stereoisomer of quinine and is used as a treatment for malaria and cardiac arrhythmias.

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

quinidine

drug used in the treatment of abnormal heart rhythms (arrhythmia) and malaria. Obtained from the bark of the Cinchona tree, quinidine shares many of the pharmacological actions of quinine; i.e., both have antimalarial and fever-reducing activity. The main use of quinidine, however, involves its activity as a myocardial depressant-that is, it depresses the excitability and conduction velocity of nerve impulses and the contractility of the heart muscle. The drug also tends to lower blood pressure. Nausea, vomiting, diarrhea, and skin rash are common reactions to the use of quinidine.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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