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Tachycardia‐induced cardiomyopathy in a young Boxer dog with supraventricular tachycardia due to an accessory pathway
Author(s) -
FOSTER SF,
HUNT GB,
THOMAS SP,
ROSS DL,
PEARSON MRB,
MALIK R
Publication year - 2006
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.2006.00030.x
Subject(s) - medicine , supraventricular tachycardia , cardiology , tachycardia , procainamide , accessory pathway , orthodromic , atrioventricular reentrant tachycardia , sinus rhythm , cardiomyopathy , ventricle , supraventricular arrhythmia , electrophysiology study , catheter ablation , dilated cardiomyopathy , anesthesia , ablation , atrial fibrillation , heart failure , electrophysiology
A 1‐year‐old male Boxer dog presented with sustained supraventricular tachycardia and tachycardia‐induced cardiomyopathy. Conversion to sinus rhythm was achieved initially with intravenous lignocaine and subsequently with oral procainamide. Oral procainamide treatment was relatively successful in maintaining normal sinus rhythm with no side effects apart from a reversible change in coat colour. Electrophysiological studies demonstrated the presence of an accessory pathway connecting the right atrium to the right ventricle and confirmed the diagnosis of orthodromic atrioventricular reciprocating tachycardia. Radiofrequency catheter ablation of the accessory pathway led to permanent resolution of the supraventricular tachycardia and for 9.5 years the dog has had no further signs of cardiac disease. The successful treatment of this condition highlights the importance of differentiating tachycardia‐induced cardiomyopathy from dilated cardiomyopathy.