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Cardiac glycosides are a class of organic compounds that increase the output force of the heart and decrease its rate of contractions by inhibiting the cellular sodium-potassium ATPase pump. [1] Their beneficial medical uses include treatments for congestive heart failure and cardiac arrhythmias ; however, their relative toxicity prevents them ...
Digoxin is in the cardiac glycoside family of medications. [4] It was first isolated in 1930 from the foxglove plant, Digitalis lanata. [7] [8] It is on the World Health Organization's List of Essential Medicines. [9] In 2021, it was the 241st most commonly prescribed medication in the United States, with more than 1 million prescriptions. [10 ...
Cardiac glycosides like digoxin, primarily inhibit the sodium-potassium pump (Na+/K+ ATPase), an important protein located on the surface of cardiomyocytes (cardiac muscle cells). [ 1 ] [ 2 ] Using ATP (the cell’s energy currency), this protein facilitates the transport of extracellular potassium ions (K+) into the cell while exporting sodium ...
These are a type of cardiac glycoside, the other being the cardenolide glycosides. Both bufadienolides and their glycosides are toxic; specifically, they can cause an atrioventricular block, bradycardia (slow heartbeat), ventricular tachycardia (a type of rapid heartbeat), and possibly lethal cardiac arrest. [1]
Cardiac stress testing is used to determine to assess cardiac function and to disclose evidence of exertion-related cardiac hypoxia. Radionuclide testing using thallium or technetium can be used to demonstrate areas of perfusion abnormalities. With a maximal stress test the level of exercise is increased until the person's heart rate will not ...
Cardenolide glycosides are often toxic; specifically, they are heart-arresting. Cardenolides are toxic to animals through inhibition of the enzyme Na + /K + -ATPase , which is responsible for maintaining the sodium and potassium ion gradients across the cell membranes.
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