Mihara et al: Effects of mitral valve repair on valvular geometry and hemodynamics in dogs with myxomatous mitral valve disease
Veterinary Surgery 3, 2024

🔍 Key Findings

• Mitral valve plasty (MVP) in dogs with MMVD significantly reduced regurgitant volume and fraction, and normalized LA:Ao ratio, indicating reversal of volume overload.
• MVP altered mitral valve geometry, with reduced annular dimensions and increased coaptation length, enhancing valve competence.
• Postoperative LA:Ao ratio dropped from 2.2 to 1.2, consistent with improved left atrial pressure and size.
• Forward stroke volume index and cardiac index increased at 3 months, reflecting improved hemodynamic function despite reduced fractional shortening.
• Three dogs (3.9%) died postoperatively, highlighting a 96.1% survival rate within 3 months.
• The repair technique involved artificial chordal replacement and annuloplasty; no cleft closure or leaflet suturing was used.
• Color Doppler echocardiography confirmed substantial reduction in mitral regurgitation postoperatively in most dogs.