Giorgia Di Blasi
Heart Valve Prosthesis Thrombogenicity: Biological Mechanisms and Computational Modeling.
Rel. Claudio Chiastra, Mariachiara Arminio, Umberto Morbiducci. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Biomedica, 2026
Abstract
Thrombogenicity models for heart valve prostheses.Heart valve prostheses may promote thrombus formation through the interaction of device-related, anatomical, biological and hemodynamic factors. This thesis analyzes the mechanisms involved in the thrombogenicity of these devices, with attention to mathematical and computational approaches used to model post-implant thrombogenic risk. First, the biological bases of thrombogenesis are described. The interplay of platelet activation, coagulation, fibrin deposition, endothelial response, inflammation, and hemolysis giving rise to thrombus formation is presented. Additionally, the role of biomechanical factors in terms of wall shear stress magnitude, flow stagnation, oscillatory shear, residence time, and shear gradients is discussed. Second, device-specific thrombogenesis mechanisms are presented.
Mechanical heart valves represent the most thrombogenic type of prostheses, mainly because rigid leaflets, geometrically complex hinge recesses, and leakage jets expose blood to non-physiological flow conditions
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