Description

Digoxin increases contractility of the myocardium by direct activity. The primary action of digoxin is specifically to inhibit adenosine triphosphatase, and thus sodium-potassium (Na+ - K+) exchange activity, the altered ionic distribution across the membrane resulting in an augmented calcium ion influx and thus an increase in the availability of calcium at the time of excitation-contraction coupling. The potency of digoxin may therefore appear considerably enhanced when the extracellular potassium concentration is low, with hyperkalaemia having the opposite effect.

ATC Classification

Code
Title
Category
Digoxin
C Cardiovascular system → C01 Cardiac therapy → C01A Cardiac glycosides → C01AA Digitalis glycosides

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