J Vet Sci.  2022 Jan;23(1):e11. 10.4142/jvs.21192.

Successful mitral repair in dogs by mitral annuloplasty using Hegar dilator: two case reports

  • 1Department of Veterinary Surgery, College of Veterinary Medicine, Chungnam National University, Daejeon 34134, Korea
  • 2Helix Animal Medical Center, Seoul 05581, Korea
  • 3Department of Thoracic Surgery, The Catholic University of Korea Eunpyeong St. Mary's Hospital, Seoul 03312, Korea


Mitral regurgitation (MR) is the most common heart disease in small-breed dogs. Mitral repair, which comprise artificial chorda tendineae implantation and mitral annuloplasty, has become the mainstay of treatment in the veterinary field. We report on two small dogs who underwent mitral repair surgery for MR. A Hegar dilator was used during mitral annuloplasty for accurate and reproducible surgery. In both cases, mitral regurgitant flow almost disappeared after surgery, and clinical signs improved. The treatment regimen was terminated 3 months after the surgery. We concluded that using a Hegar dilator may facilitate mitral valve repair surgery.


Case reports; dog; cardiac surgery; mitral valve; mitral annuloplasty
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