Table of Contents Author Guidelines Submit a Manuscript
Case Reports in Veterinary Medicine
Volume 2014, Article ID 892625, 5 pages
Case Report

Mitral Valve Replacement with a Mechanical Valve for Severe Mitral Regurgitation in a Small Dog

1Chayagasaka Animal Hospital, 1-1-5 Shinnishi, Chikusa, Nagoya, Aichi 464-0003, Japan
2Green Animal Hospital, 179 Tamakake-maeda, Nanbu, Sannohe, Aomori 039-0101, Japan
3Miyashita Animal Hospital, 5-8-29 Keigoya, Kure, Hiroshima 737-0012, Japan
4Veterinary Internal Medicine of Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan
5Animal Teaching Hospital of Gihu University, 1-1 Yanagido, Gifu 501-1193, Japan

Received 16 April 2014; Revised 7 July 2014; Accepted 14 July 2014; Published 6 August 2014

Academic Editor: Paola Roccabianca

Copyright © 2014 Daisuke Taguchi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A seven-year-old Shih Tzu with refractory repeated pulmonary edema and syncope was presented for surgical operation. From the results of cardiovascular examinations, the dog was diagnosed as severe mitral regurgitation (ACVIM consensus class D) and mild tricuspid regurgitation. The dog first underwent surgery with mitral valve plasty; however, the results were unsatisfactory due to severe damage of the whole mitral valve. The operation was quickly changed to mitral valve replacement using a mechanical valve (19 mm). The dog survived surgery and lived for 2 years and one month after operation using long-term anticoagulant (warfarin) therapy in spite of several thrombosis-related events.