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Case Reports
. 2007 Jun;48(6):623-6.

Myocardial fibrosis in a horse with polymorphic ventricular tachycardia observed during general anesthesia

Virginie Coudry  1 , Daniel Jean, Christophe Desbois, Aziz Tnibar, Claire Laugier, Catherine George
Affiliations
Case Reports

Myocardial fibrosis in a horse with polymorphic ventricular tachycardia observed during general anesthesia

Virginie Coudry et al. Can Vet J. 2007 Jun.

Abstract
in English, French

Ventricular dysrhythmias are more commonly associated with myocardial disease than are supraventricular dysrhythmias. Management of arrhythmias under general anesthesia is difficult because of the dysrhythmogenic effects of the anesthetic drugs. This report describes a severe ventricular dysrhythmia observed in a pony under general anesthesia, with a severe and old myocardial fibrosis found on postmortem examination.

Fibrose du myocarde chez un cheval présentant de la tachycardie ventriculaire polymorphe observée au cours d’une anesthésie générale. Les dysrythmies ventriculaires sont plus souvent associées aux maladies du myocarde que ne le sont les dysrythmies supraventriculaires. Les mesures à prendre lors d’arythmie survenant lors d’anesthésie générales sont compliquées par les effets dysrythmogènes des agents anesthésiques. Ce rapport décrit une dysrythmie ventriculaire grave observée chez un poney au cours d’une anesthésie générale et dont on a constaté à la nécropsie une grave et vielle fibrose du myocarde.

(Traduit par Docteur André Blouin)

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Figures

Figure 1
Figure 1
Base-apex lead ECG (upper trace) (12.5 mm/s) and arterial pressure (lower trace) recordings 2 hours after induction of anesthesia. Normal sinus complexes (1st, 3rd, and 5th beats) are observed at the beginning of the strip, coupled with PVCs of the same morphology (2nd, 4th, and 6th beats). The 7th beat and thereafter correspond to a 2nd population of PVCs (opposite direction) and form together paroxysmal ventricular tachycardia (7 PVCs successively). A P-wave is intercalated between the 5th QRS complex and its T wave.
Figure 2
Figure 2
Macroscopic appearance of the heart. Note the multifocal wide white-grey areas on the epicardium of the left ventricle.
See this image and copyright information in PMC

References

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