NCIt definition : A glycoside compound, extracted from the leaves and seeds of the common foxglove,
with anti-arrhythmic property. Digitalin inhibits the enzymatic activity of the sodium-potassium
ATPase pump in cardiac tissue, thereby increasing intracellular sodium and calcium
levels and providing a positive inotropic effect. This results in increased force
of myocardial muscle contraction. This agent also has a vagal effect on the parasympathetic
nervous system, and as such slows the ventricular heart rate as well as helps eliminate
fluid from body tissues.;