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Arrhythmogenic Right Ventricular Cardiomyopathy, Dog 77.e1

VetBooks.ir Diseases and Disorders

ARRHYTHMOGENIC RIGHT VENTRICULAR CARDIOMYOPATHY, CANINE. A 60-second lead II electrocar-
diogram (ECG) at 50 mm/sec paper speed and 10 mm/mV calibration. The ECG was obtained from a 25-kg, 5-year-old
male castrated boxer dog, showing initially ventricular tachycardia characteristic of ARVC, with a positive (upright)
morphology in lead II. He was treated with two 2 mg/kg IV lidocaine boluses, at which point he converted to a normal
sinus rhythm with frequent, polymorphic ventricular premature complexes (VPCs) seen as single, couplet, and triplet
morphologies. This dog’s VPCs have frequent superimposition of the R wave on the T wave (R on T morphology), making
his arrhythmia particularly dangerous. He was started on 60 mg of sotalol PO q 12h in hospital and was maintained
on a lidocaine continuous rate infusion (CRI) with continuous ECG monitoring. After weaning his CRI, he was discharged
on sotalol.

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