Canadian Medical Guide > Chemicals and Drugs > Cardiovascular Agents > Anti-Arrhythmia Agents Terms and Definitions

Anti-Arrhythmia Agents

Medical Definition:	Agents used for the treatment or prevention of cardiac arrhythmias. They may affect the polarization-repolarization phase of the action potential, its excitability or refractoriness, or impulse conduction or membrane responsiveness within cardiac fibers. Anti-arrhythmia agents are often classed into four main groups according to their mechanism of action: sodium channel blockade, beta-adrenergic blockade, repolarization prolongation, or calcium channel blockade.
Guide Notes:	consider also ARRHYTHMIA /drug ther
Also Called:	Cardiac Depressants,Antifibrillatory Agents

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