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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.
The following are medications commonly prescribed cardiac pharmaceutical agents. The specificity of the following medications is highly variable, and often are not particularly specific to a given class. As such, they are listed as are commonly accepted.
Potassium channel blockers Amiodarone; Dofetilide; Dronedarone; E-4031; Ibutilide; Sotalol; Vernakalant; K + channel blocker. Sotalol is also a beta blocker [5] Amiodarone has mostly Class III activity, but also I, II, & IV activity [6] Prevent paroxysmal atrial fibrillation [7] and haemodynamically stable ventricular tachycardia [8] (amiodarone)
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A potassium channel opener is a type of drug which facilitates ion transmission through potassium channels. ... Potassium channel blocker; References
Cardiovascular agents are drugs used to treat diseases associated with the heart or blood vessels. These medications are available for purchase only with a physician’s prescription . They include, but are not limited to, drugs that target hypertension ( antihypertensives ), hyperlipidemia ( antihyperlipidemics ) and blood clotting (blood ...
Some channels conduct multiple ion currents and some are gated by multiple mechanisms. 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
Quinidine also blocks certain voltage-gated potassium channels (e.g., K v 1.4, K v 4.2, hERG, among others), [16] [17] acts as an antimuscarinic and alpha-1 blocker, [18] and is an antimalarial. [15] It is said to be a selective muscarinic acetylcholine M 3 receptor antagonist .