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J Vet Cardiol. 2018 Jun;20(3):204-212. doi: 10.1016/j.jvc.2018.02.002. Epub 2018 Mar 20.

Clinical and electrocardiographic presentations of transient trifascicular block in three cats.

Author information

1
Cornell University College of Veterinary Medicine, 930 Campus Road, 14853, Ithaca, NY, USA.
2
Cornell University College of Veterinary Medicine, 930 Campus Road, 14853, Ithaca, NY, USA. Electronic address: rs2259@cornell.edu.

Abstract

This report describes transient trifascicular block in three cats presented with lethargy and inappetence, and elevated cardiac troponin I concentrations. The electrocardiogram (ECG) of cat 1 showed a sinus rhythm with pronounced first-degree atrioventricular (AV) block, right bundle branch block, and left anterior fascicular block. The ECG of cat 2 showed truncular left bundle branch block alternating with left anterior fascicular block coupled with prolonged PR intervals, second-degree heart block, and paroxysmal third-degree AV block. The ECG of cat 3 showed first-degree AV block with concomitant right bundle branch block. The diagnosis of trifascicular block was made when paroxysmal third-degree AV block was documented. All cats recovered with medical management within weeks. Each cat resumed a sinus rhythm. Elevated cardiac troponin I concentrations suggested myocarditis that improved.

KEYWORDS:

Atrioventricular block; Bundle branch block; Myocarditis; Troponin I

PMID:
29572123
DOI:
10.1016/j.jvc.2018.02.002
[Indexed for MEDLINE]

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