| abstract |
A stent (1) used for a heart valve prosthesis and the heart valve prosthesis that comprises the stent (1) and is used for heart valve replacement. The stent (1) is used for supporting the heart valve (3) and comprises, along a longitudinal axis, an inflow channel (8), an outflow channel (6) and a transition region (7) located between the inflow channel (8) and the outflow channel (6). The stent (1) is provided with a collapsed delivery configuration and an expanded deployment configuration. In the expanded configuration, the inflow channel (8) is provided with a concave structure that matches a petal ring primary structure. Through the concave structure, the stent (1) can implement a self-positioning function and be tightly attached after implantation, preventing a shift and perivalvular leakage from happening |