2026-03-05T13:35:55Z https://az.repo.nii.ac.jp/oai

oai:az.repo.nii.ac.jp:02000312 2025-02-13T06:01:02Z 423

Combination of the Modified Loop Technique and De Vega Annuloplasty in Dogs with Mitral Regurgitation Aoki, Takuma Aoki Takuma Miyamoto, Takashi Miyamoto Takashi Fukamachi, Naoyuki Fukamachi Naoyuki Niimi, Seiya Niimi Seiya Jingya, Yao Jingya Yao Wakao, Yoshito Wakao Yoshito Background: Detailed surgical techniques for treating canine mitral regurgitation have not been previously reported. Method: This case series included six consecutive client-owned dogs with mitral regurgitation. All dogs underwent a combined protocol, including the modified loop technique and De Vega annuloplasty (MODEL surgery), in 2021. Artificial loops covering 80% of the length of the strut chordae tendineae were used for chordal replacement. Mitral annuloplasty was subjectively performed, targeting the circumference of the septal leaflet. Results: The breeds were Chihuahua-mixed breed, Spitz, Pomeranian, Cavalier King Charles Spaniel, and Chihuahua, with average ages and weights of 11.4 ± 2.3 years and 5.49 ± 2.98 kg, respectively. The aortic cross-clamp, pumping, and surgery times were 64.0 ± 7.5 min, 168.5 ± 39.1 min, and 321.0 ± 53.1 min, respectively. After MODEL surgery, left atrial-to-aortic ratios significantly decreased from 2.20 ± 0.18 to 1.26 ± 0.22 (p < 0.01), and left ventricular end-diastolic internal diameter normalized to body weight significantly decreased from 2.03 ± 0.26 to 1.48 ± 0.20 (p < 0.01). In all cases, the clinical signs disappeared or improved significantly. Conclusions: MODEL surgery increased mitral valve coaptation, normalized heart sizes, and significantly improved clinical signs in dogs with mitral regurgitation. MDPI AG 2022-06-27 eng journal article VoR https://az.repo.nii.ac.jp/records/2000312 10.3390/ani12131653 Animals 12 13 1653 1653 https://az.repo.nii.ac.jp/record/2000312/files/animals-12-01653-v2.pdf application/pdf 1.2 MB 2025-02-07