An alkaloid, originally from Atropa belladonna, but found in other plants, mainly SOLANACEAE. (MeSH: 68001285)

Anti-Arrhythmia Agents - 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. (Year introduced: 1976) (MeSH:68000889)

PubChem image 174174