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The five main classes in the Vaughan Williams classification of antiarrhythmic agents are: Class I agents interfere with the sodium (Na +) channel. Class II agents are anti-sympathetic nervous system agents. Most agents in this class are beta blockers. Class III agents affect potassium (K +) efflux. Class IV agents affect calcium channels and ...
Sparteine is a class 1a antiarrhythmic agent and sodium channel blocker. It is an alkaloid and can be extracted from scotch broom.It is the predominant alkaloid in Lupinus mutabilis, and is thought to chelate the bivalent metals calcium and magnesium.
It is a sodium channel blocker and is classified as a Class 1a anti-arrhythmic agent. [3] [4] Disopyramide has a negative inotropic effect on the ventricular myocardium, significantly decreasing the contractility. [5] [6] Disopyramide also has general anticholinergic effects which contribute to unwanted adverse effects. Disopyramide is ...
Of the sodium channel blocking antiarrhythmic agents (the class I antiarrhythmic agents), the class Ic agents have the most potent sodium channel blocking effects. Class Ic agents are indicated for supraventricular arrhythmias (i.e. atrial fibrillation) and as a last line treatment for refractory life-threatening ventricular tachycardia or ...
Representation of the ion channel opening/closing that antiarrhythmics act upon . Antiarrhythmics are broad class of drugs that are used treat heart rhythm irregularities. [16] Utilizing the Vaughan-Williams (VW) system, antiarrhymic drugs are classified into four main classes based on their mechanism of action. Class I antiarrhymics lead to ...
Ajmaline (also known by trade names Gilurytmal, Ritmos, and Aritmina) is an alkaloid that is classified as a 1-A antiarrhythmic agent.It is often used to induce arrhythmic contraction in patients suspected of having Brugada syndrome.
Serious side effects may include cardiac arrest, arrhythmias, and heart failure. [1] It may be used in pregnancy, but has not been well studied in this population. [3] [4] Use is not recommended in those with structural heart disease or ischemic heart disease. [1] Flecainide is a class Ic antiarrhythmic agent. [1]
Amiodarone has particularly important interactions with the following drugs: class I antiarrhythmics (amiodarone should not be combined with other class I antiarrhythmic drugs, such as disopyramide, flecainide, procainamide, quinidine, etc., due to an increased risk of QTc prolongation and potential arrhythmias); [13]