Epidemiological and Morphological Studies of Double-Chambered Right Ventricle in Dogs
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概要
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The double-chambered right vsentricle (DCRV) is a rare congenital cardiac disease in dogs, and its detailed epidemiological and morphological features are not clearly understood. By investigating the profile, clinical signs, and characteristics of examination findings of eleven dogs with DCRV by means of a retrospective study, we attempted to clarify the epidemiology and morphology of the condition. The study group consisted of nine males and two females. Breeds included Pug (n=3), Miniature Dachshund (n=1), French Bull-dog (n=1), Shiba (n=1), and Retrievers (n=5). The attachment site of the anomalous muscular bundle was continuous with the cardiac apex in nine dogs, and it was attached to the right ventricle free wall in the other two dogs. In dogs with DCRV, at least one of the following conditions was present concurrently: congenital or acquired tricuspid valve regurgitation (TR), ventricular septal defect, and atrial septal defect. Also, the pressure difference between the two chambers increased over time, and progressive right-sided heart failure was observed. In summary, DCRV occurs in small breeds of dog as well as in large breeds of dog and it may be more prevalent in males. The existence of two types of DCRV in dogs was established. Dog with DCRVs will have a high incidence of concurrent cardiac abnormalities. Concurrent TR may be either congenital or acquired. DCRV is a congenital disorder, but the clinical condition progresses as the dog develops.
著者
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Machida Noboru
Department Of Veterinary Clinical Oncology Faculty Of Agriculture Tokyo University Of Agriculture An
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Hirose Hisashi
Department Of Cardiovascular Diseases Mri Tokyo Medical And Dental University
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MATSUMOTO Hirotaka
Department of Pathology, Yamanashi Medical College
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KOYAMA Hidekazu
Department of Veterinary Nursing, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science
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TANAKA Ryou
Department of Veterinary Surgery, Tokyo University of Agriculture and Technology
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SUZUKI SHUJI
Department of Respiratory Oncology and Molecular Medicine, Division of Cancer Control, Institute of
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TAKASHIMA Kazuaki
Animal Clinical Research Foundation
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YAMANE Yoshihisa
Animal Clinical Research Foundation
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FUKUSHIMA Ryuji
Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Techno
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HAMABE Rina
Department of Veterinary Surgery, Faculty of Agriculture, Tokyo University of Agriculture and Techno
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NAKAO Shu
Department of Veterinary Clinical Oncology, Faculty of Agriculture, Tokyo University of Agriculture
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SAIDA Yuto
Animal Clinical Research Foundation
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Suzuki Shuji
Department Of Gastroenterology Hachioji Digestive Disease Hospital
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