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Potassium channel blockers exhibit reverse use-dependent prolongation of the action potential duration. Reverse use dependence is the effect where the efficacy of the drug is reduced after repeated use of the tissue. [11] This contrasts with (ordinary) use dependence, where the efficacy of the drug is increased after repeated use of the tissue.
HERG blocker (57 P) Pages in category "Potassium channel blockers" The following 66 pages are in this category, out of 66 total.
Class of medications that are competitive antagonists that block the receptor sites for the endogenous catecholamines epinephrine (adrenaline) and norepinephrine (noradrenaline) on adrenergic beta receptors, of the sympathetic nervous system.
Class IV agents are slow non-dihydropyridine calcium channel blockers. They decrease conduction through the AV node , and shorten phase two (the plateau) of the cardiac action potential . They thus reduce the contractility of the heart, so may be inappropriate in heart failure.
For more examples of pharmacological modulators of potassium channels, see potassium channel blocker and potassium channel opener. Potassium channel classes, function, and pharmacology. [ 6 ]
Examples of targets for modulators include: Voltage-gated ion channels. Calcium channel: see also Calcium channel blocker, Calcium channel opener; Potassium channel: see also Potassium channel blocker, Potassium channel opener; Sodium channel: see also Sodium channel blocker, Sodium channel opener
Example of voltage-dependent potassium ion channel in relation to changing ion concentrations . To comprehend the mechanism of channel blockers, it is critical to understand the composition of ion channels. Their main function is to contribute to the resting membrane potential of a cell via the flow of ions through a cell membrane.
1 Examples. 2 See also. ... A potassium channel opener is a type of drug which facilitates ion transmission through potassium ... Potassium channel blocker; References