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Effects of catheter pump auxiliary mode on cardiovascular and coronary hemodynamics
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(School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China)
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Abstract The Impella-like catheter pump assisted centralized parameter model of cardiovascular and coronary artery system was constructed to investigate the hemodynamics of patients with coronary stenosis and the influence of catheter pump on coronary artery system by numerical method. The results show that different auxiliary modes of catheter pump can effectively improve the cardiovascular cardiac output in patients with left main stenosis complicated with heart failure for helping the left ventricle unload. The variable speed model and constant speed model of the catheter pump can effectively improve the blood perfusion volume and coronary pressure of coronary artery in the case of stenosis to maintain the stability of hemodynamics. When the stenosis degrees of left main trunk are 60% and 80%, the flow rates of left main trunk can be respectively increased by 38.1% and 47.4% at variable speed, which are higher than those at constant speed mode. Compared with constant speed assisted mode, variable speed mode has obvious advantages for improving cardiac output, stenosis coronary artery flow and blood flow pulsatility.
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Received: 10 October 2021
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