Document Detail

Electrical cardioversion of sustained ventricular tachycardia in three Boxers.
MedLine Citation:
PMID:  20187820     Owner:  NLM     Status:  MEDLINE    
CASE DESCRIPTION: 2 spayed female (8 and 9 years old) and 1 sexually intact male (6.5 years old) Boxers were treated because of sustained ventricular tachycardia by electrical cardioversion. CLINICAL FINDINGS: Physical examination of the 8-year-old female Boxer revealed tachycardia (heart rate, 250 beats/min), weak femoral pulses, pale mucous membranes, panting, and lethargy. The 6.5-year-old male Boxer had similar physical examination findings, with the addition of a syncopal event. Analysis of the ECG rhythm strips for the 8- and 6.5-year-old dogs indicated a right ventricular origin of the ventricular tachycardia. The 9-year-old female Boxer was being treated with an IV constant rate infusion of lidocaine hydrochloride because of ventricular arrhythmias during the initial examination; physical examination re-vealed weakness, pale mucous membranes, prolonged capillary refill time, weak femoral pulses, and tachycardia (heart rate, 265 beats/min). Analysis of the ECG rhythm strip for the 9-year-old Boxer indicated a left ventricular origin of the ventricular tachycardia. TREATMENT AND OUTCOME: Pharmacological cardioversion treatment was unsuccessful in all 3 Boxers; however, electrical cardioversion by use of a biphasic defibrillator synchronized to conduct 30 J of energy during the peak of the QRS complex was successful in each dog. The electrical cardioversion procedure was performed 2 times (5-day interval between procedures) in the 9-year-old female as a result of relapse of the ventricular tachycardia condition. CLINICAL RELEVANCE: Results and follow-up monitoring suggested electrical cardioversion of sustained ventricular tachycardia may be a safe and effective treatment in Boxers that are unresponsive to medical treatment.
Robert Prosek
Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Journal of the American Veterinary Medical Association     Volume:  236     ISSN:  0003-1488     ISO Abbreviation:  J. Am. Vet. Med. Assoc.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-01     Completed Date:  2010-04-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503067     Medline TA:  J Am Vet Med Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  554-7     Citation Subset:  IM    
Veterinary Specialists Incorporated, Animal Heart Centers, 91 NE 6th St, Homestead, FL 33030, USA.
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MeSH Terms
Dog Diseases / therapy*
Electric Countershock / veterinary*
Tachycardia, Ventricular / therapy,  veterinary*

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