What are Cardiac Glycosides? Give their effect on heart and their therapeutic uses

Cardiac glycosides are a group of naturally occurring compounds that have potent effects on the heart. They are derived primarily from plants, most notably the foxglove plant (*Digitalis purpurea*), though they can also be obtained from the toadstool *Apocynum* and other plants. The main pharmacologically active compounds in this class include digoxin and digitoxin. Cardiac glycosides are traditionally used to treat heart failure and certain arrhythmias due to their ability to enhance cardiac contractility and regulate heart rhythms.

Mechanism of Action:
Cardiac glycosides exert their effects primarily by inhibiting the sodium-potassium ATPase pump located in the cell membrane of cardiac muscle ___ _____ _________ _________ ____ ___.
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