Pathology : Arrhythmogenic right ventricular cardiomyopathy coincided with the cardiac fibrosis in the inner muscle layer of the left ventricular wall in a boxer dog

  • YAMADA Naoaki
    Pathology Department, Kashima Laboratory, Nonclinical Research Center, LSI Medience Corporation, 14–1 Sunayama, Kamisu-shi, Ibaraki 314–0255, Japan
  • KITAMORI Takashi
    Kitamori Pet Clinic, 2368 Kobayashi, Mobara-shi, Chiba 297–0074, Japan
  • KITAMORI Fumiyo
    Kitamori Pet Clinic, 2368 Kobayashi, Mobara-shi, Chiba 297–0074, Japan
  • ISHIGAMI Kanako
    Donnalou Boxers, 453–40 Washizu, Sugito-machi, Kitakatsushika-gun, Saitama 345–0002, Japan
  • IWANAGA Koji
    Tokyo Veterinary Cardiology Center, 8–19–12 Fukasawa, Setagaya-ku, Tokyo 158–0081, Japan
  • ITOU Taiki
    Camic Co. Ltd., 17–8–3 Midori, Sumida-ku, Tokyo 130–0021, Japan
  • KOBAYASHI Ryosuke
    Pathology Department, Kashima Laboratory, Nonclinical Research Center, LSI Medience Corporation, 14–1 Sunayama, Kamisu-shi, Ibaraki 314–0255, Japan
  • KUMABE Shino
    Pathology Department, Kashima Laboratory, Nonclinical Research Center, LSI Medience Corporation, 14–1 Sunayama, Kamisu-shi, Ibaraki 314–0255, Japan
  • DOI Takuya
    Pathology Department, Kashima Laboratory, Nonclinical Research Center, LSI Medience Corporation, 14–1 Sunayama, Kamisu-shi, Ibaraki 314–0255, Japan
  • SATO Junko
    Pathology Department, Kashima Laboratory, Nonclinical Research Center, LSI Medience Corporation, 14–1 Sunayama, Kamisu-shi, Ibaraki 314–0255, Japan
  • WAKO Yumi
    Pathology Department, Kashima Laboratory, Nonclinical Research Center, LSI Medience Corporation, 14–1 Sunayama, Kamisu-shi, Ibaraki 314–0255, Japan
  • TSUCHITANI Minoru
    Pathology Department, Kashima Laboratory, Nonclinical Research Center, LSI Medience Corporation, 14–1 Sunayama, Kamisu-shi, Ibaraki 314–0255, Japan

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  • Arrhythmogenic right ventricular cardiomyopathy coincided with the cardiac fibrosis in the inner muscle layer of the left ventricular wall in a boxer dog

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説明

A 7-year-old female boxer dog died suddenly without any clinical signs. It was suspected that the dog had arrhythmogenic right ventricular cardiomyopathy (ARVC) due to ventricular premature complexes and ventricular tachycardia at 3 years of age. The final diagnosis of ARVC was confirmed by histological characteristics, such as loss of cardiocytes and fibrofatty replacement, occurring in the right and left ventricular walls. In the cardiocytes, non-lipid vacuoles were observed. Cardiac fibrosis and intimal thickening of the small arteries occurred without fatty replacement in the inner muscle layer including the papillary muscles of the left ventricular wall. This paper describes the pathomorphological details of an ARVC case with coincidental cardiac fibrosis in the inner muscle layer of the left ventricular wall.

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