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Cardiac glycosides affect the sodium-potassium ATPase pump in cardiac muscle cells to alter their function. [1] Normally, these sodium-potassium pumps move potassium ions in and sodium ions out. Cardiac glycosides, however, inhibit this pump by stabilizing it in the E2-P transition state, so that sodium cannot be extruded: intracellular sodium ...
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 ...
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 ...
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]
Greater care is required in older people and those with poor kidney function. [6] It is unclear whether use during pregnancy is safe. [3] 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 ...
Salicin, a glycoside related to aspirin Chemical structure of oleandrin, a cardiac glycoside. In chemistry, a glycoside / ˈ ɡ l aɪ k ə s aɪ d / is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in living organisms. Many plants store chemicals in the form of ...
Cerberin is a type of cardiac glycoside, found in the seeds of the dicotyledonous angiosperm genus Cerbera; including the suicide tree (Cerbera odollam) and the sea mango (Cerbera manghas). As a cardiac glycoside, cerberin disrupts the function of the heart by blocking its sodium and potassium ATPase. [2]
Digitoxin is a cardiac glycoside used for the treatment of heart failure and certain kinds of heart arrhythmia. It is a phytosteroid and is similar in structure and effects to digoxin, though the effects are longer-lasting. Unlike digoxin, which is eliminated from the body via the kidneys, it is eliminated via the liver, and so can be used in ...