2018 ACVIM Forum Research Abstract Program: Seattle, Washington, June 14 - 15, 2018

The median age of evaluated patients was 8 years (range, 7-11). There were 6 males and 4 females with no sexually intact patients. Eight dogs initially received other anti-arrhythmic therapy (2/8 mexiletine monotherapy, 2/8 sotalol monotherapy, 3/8 mexiletine/sotalol dual therapy, 1/8 sotalol/diltiazem dual therapy). Two dogs did not receive antiarrhythmic medication prior to evaluation. Amiodarone was instituted most commonly in dogs with systolic dysfunction +/-congestive heart failure, intolerance to particular anti-arrhythmic, or tachyarrhythmias refractory to other antiarrhythmics. Median maintenance amiodarone dose was 7.52 mg/kg/d (range, 6.32-10.17) preceded by a median amiodarone loading dose of 15.46 mg/kg/d (range, 14.14-20.34) for 7 days.