Long-term survival of two dogs after mitral valve plasty

  • Isamu Kanemoto | chayagasaka.kanemoto@gmail.com Chayagasaka Animal Hospital, Nagoya, Japan.
  • Daisuke Taguchi Chayagasaka Animal Hospital, Nagoya; Green Animal Hospital, Sannohe, Japan.
  • Kippei Mihara Chayagasaka Animal Hospital, Nagoya, Japan.
  • Koudai Kawase Chayagasaka Animal Hospital, Nagoya; Sapporo Night Animal Hospital Emergency and Critical Care, Sapporo, Japan.
  • Keiichi Sato Chayagasaka Animal Hospital, Nagoya, Japan.
  • Kazuya Iwata Iwata Animal Hospital, Gihu, Japan.
  • Kouji Iwanaga Tokyo Veterinary Cardiology Center, Meguro, Japan.


Two small 9-year-old dogs received mitral valve plasty (MVP) for severe mitral regurgitation that could not be controlled via drug administration. MVP consisted of chordal reconstruction using expanded polytetrafluoroethylene (ePTFE) sutures and semicircular suture annuloplasty using polypropylene sutures. In both cases, the clinical signs dramatically improved after MVP, although postoperative echocardiography revealed slight residual mitral regurgitant flow. Both dogs survived for several years after MVP without any signs of cardiac distress; one dog survived for 9 years and 1 month, and the other dog survived for 7 years and 10 months. These findings highlight the durability of ePTFE sutures as artificial chordae and the excellence of semicircular suture annuloplasty in small dogs.



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Case Reports
mitral valve plasty, chordal reconstruction, semicircular suture annuloplasty, long-term survival, small dog
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How to Cite
Kanemoto, I., Taguchi, D., Mihara, K., Kawase, K., Sato, K., Iwata, K., & Iwanaga, K. (2017). Long-term survival of two dogs after mitral valve plasty. Veterinary Science Development, 7(1). https://doi.org/10.4081/vsd.2017.6335