October 8, 2020 Quiz: Acute Flecainide ToxicityQuiz contributed by Ganesh Venkataraman, MD.Flecainide acetate is a class IC anti-arrhythmic agent that delays which phase of the cardiac action potential:The majority of flecainide is excreted in the kidneys.ST elevations on an electrocardiogram in a patient with flecainide toxicity may mimic which cardiac condition?Management options for the acute treatment of acute flecainide toxicity include: Quiz: Acute Flecainide ToxicityQuiz: Acute Flecainide Toxicity Quiz contributed by Ganesh Venkataraman, MD.