<prompt> Answer this question truthfullyFor what purpose are antiarrhythmic medications used in the management of congestive heart failure?  <response>: <reason> There are multiple causes of sudden cardiac death in the patient with congestive heart failure which include not only arrhythmic causes, but also thrombotic and other causes:Arrhythmic causes Ventricular tachycardia Ventricular fibrillation BradyarrhythmiasThrombotic causes: Acute MI Pulmonary embolismOther causes: HyperkalemiaThe metabolism of following anti-arrhythmic drugs are significantly affected in patients with congestive heart failure and care should be taken regarding their administration:Patients with congestive heart failure should not be treated with dronedarone. 