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Amiodarone is an antiarrhythmic medication used to treat and prevent a number of types of cardiac dysrhythmias. [4] This includes ventricular tachycardia, ventricular fibrillation, and wide complex tachycardia, atrial fibrillation, and paroxysmal supraventricular tachycardia. [4] Evidence in cardiac arrest, however, is poor. [5]
Amiodarone is also safe to use in individuals with cardiomyopathy and atrial fibrillation, to maintain normal sinus rhythm. Amiodarone prolongation of the action potential is uniform over a wide range of heart rates, so this drug does not have reverse use-dependent action. Amiodarone was the first agent described in this class. [4]
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) Treat atrial flutter and ...
Clinical trials have compared dronedarone to placebo and to amiodarone, for its ability to reduce atrial fibrillation, to reduce mortality overall and from cardiac causes, and for its adverse effects, including excess mortality. [5] [9] Dronedarone is a non-iodinated class III anti-arrhythmic drug which helps patients return to normal sinus rhythm.
[5] cAMP is the second messenger that controls the level of calcium available to allow the heart to contract. An IV administration of amrinone has been shown to increase cardiac output (CO) and stroke volume (SV), while concurrently reducing the filling pressure of the left ventricle and decreasing the resistance in the peripheral vasculature.
The elimination half-life of dofetilide is roughly 10 hours; however, this varies based on many physiologic factors (most significantly creatinine clearance), and ranges from 4.8 to 13.5 hours. Due to the significant level of renal elimination (80% unchanged, 20% metabolites), the dose of dofetilide must be adjusted to prevent toxicity due to ...
Amiodarone induced thyrotoxicosis (AIT) is a form of hyperthyroidism due to treatment with antiarrhythmic drug, amiodarone. Amiodarone induced thyroid dysfunction more commonly results in hypothyroidism , estimated to occur in 6-32% of patients, whereas hyperthyroidism from amiodarone use is estimated at 1-12%. [ 1 ]
Contraindications [ edit ] Amiloride is contraindicated in people with kidney problems (e.g. anuria, acute or chronic kidney disease , or diabetic nephropathy ), elevated blood potassium (≥5.5 mEq/L), or people that are hypersensitive to amiloride or any ingredients within the specific formulation.