Abstract:Left ventricular reconstruction is an effective method to treat heart failure. The left ventricular reconstruction device is implanted into the left ventricle with a nickel-titanium alloy stent. Nowadays, the nickel-titanium alloy stent from Cardiokinetix Company of the United States is basically used. In order to break through the technical bottleneck of the Cardiokinetix company's stent that cannot be positioned multiple times during surgery and cannot be recycled, as well as the foreign technology monopoly of this product, the fatigue performance of the first-generation stent and the iteratively designed stent was compared to meet the fatigue life of 380 million times. The finite element method is used to compare the peak equivalent stress of the original bracket and the iteratively designed bracket to determine the impact of stress concentration on fatigue fracture. The alternating strains are compared to evaluate the fatigue limits of the two brackets. The fatigue life prediction based on unified setting conditions can be The lifespan of the stent after the iterative design is approximately 4.84 times the fatigue life of the original stent. The research results provide an important reference for the structural design and biomechanical analysis of the stent, and have good clinical application prospects and economy for the treatment of heart failure.