
Disopyramide (INN, trade names Norpace and Rythmodan) is an antiarrhythmic medication used in the treatment of Ventricular Tachycardia. It is a sodium channel blocker and therefore classified as a Class 1a anti-arrhythmic agent.’ Disopyramide has a negative inotropic effect on the ventricular myocardium, significantly decreasing the contractilit...
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http://en.wikipedia.org/wiki/Disopyramide

<chemical> Alpha-(2-(bis(l-methylethyl)amino)ethyl)-alpha-phenyl-2-pyridine acetamide. A class I anti-arrhythmic agent (one that interferes directly with the depolarisation of the cardiac membrane and thus serves as a membrane-stabilizing agent) with a depressant action on the heart similar to that of guanidine. It also possesses some anticho...
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http://www.encyclo.co.uk/local/20973

(di″so-pir´ә-mīd) an agent used to control cardiac arrhythmias; it suppresses and prevents recurrence of both unifocal premature ventricular contractions and those of multifocal origin, paired premature ventricular contractions, and episodes of ventricular tachycardia that are not persistent.
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http://www.encyclo.co.uk/local/21001

Disopyramide is an anti-arrhythmic drug used to correct heart rhythm disorders which it does by delaying nerve impulses to the heart to regulate the heartbeat.
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http://www.probertencyclopaedia.com/browse/ED.HTM

a substance, CHNO, used in its phosphate form in the symptomatic and prophylactic treatment of certain cardiac arrhythmias.
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https://www.infoplease.com/dictionary/disopyramide
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