To verify the safety and effectiveness of transcatheter mitral valve clip delivery system and steerable guide catheter produced by Shanghai Shenqi Medical Technology Co., Ltd.in patients with moderate-severe or severe degenerated mitral regurgitation (DMR).
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1. Incidence of composite endpoint of no death, no surgical mitral valve-related procedures due to mitral valve dysfunction, and no moderate-severe or severe MR (MR>2+) at 12 months after surgery
Timeframe: 12 months after surgery