Familial cardiomyopathy in Norwegian Forest cats

Maerz, I; Wilkie, L J; Harrington, N; Payne, J R; Muzzi, R A L; Haggstrom, J; Smith, K C; Fuentes, V L

Abstract

Norwegian Forest cats (NFCs) are often listed as a breed predisposed to cardiomyopathy, but the characteristics of cardiomyopathy in this breed have not been described. The aim of this preliminary study was to report the features of NFC cardiomyopathy based on prospective echocardiographic screening of affected family groups; necropsy findings; and open-source breed screening databases. Prospective examination of 53 NFCs revealed no murmur or left ventricular (LV) outflow tract obstruction in any screened cat, though mild LV hypertrophy (defined as diastolic LV wall thickness ≥5.5mm) was present in 13/53 cats (25%). Gross pathology results and histopathological sections were analysed in eight NFCs, six of which had died of a cardiac cause. Myocyte hypertrophy, myofibre disarray and interstitial fibrosis typical of hypertrophic cardiomyopathy were present in 7/8 cats, but endomyocardial fibrosis suggestive of restrictive cardiomyopathy was also present in the same cats. Pedigree data analysis from 871 NFCs was supportive of a familial cardiomyopathy in this breed.

Citation

Maerz, I., Wilkie, L. J., Harrington, N., Payne, J. R., Muzzi, R. A. L., Haggstrom, J., …Fuentes, V. L. (2015). Familial cardiomyopathy in Norwegian Forest cats. Journal of Feline Medicine and Surgery, 17(8), 681-91. https://doi.org/10.1177/1098612X14553686

• Journal Article Type: Other
• Acceptance Date: Sep 8, 2014
• Publication Date: Aug 1, 2015
• Deposit Date: Nov 11, 2014
• Journal: JOURNAL OF FELINE MEDICINE AND SURGERY
• Print ISSN: 1098-612X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 17
• Issue: 8
• Pages: 681-91
• DOI: https://doi.org/10.1177/1098612X14553686
• Public URL: https://rvc-repository.worktribe.com/output/1400050
• Additional Information: Corporate Creators : Lavras, Swedish University of Agricultural Sciences