Development of a Simulator for Cardiac Function Evaluation Before and After Left Ventricular Plasty Surgery

概要

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Myocardial infarction and dilated cardiomyopathy significantly impair patients' cardiac functions. For these diseases, l eft ventricular plasty surgery has been used as a substitution for heart transplants from the 1980s and is improved to enhance the surgical effects and safety. We present a simulation system that enables cardiovascular surgeons to estimate functional improvements of left heart due to left ventricular plasty. The cardiac functions are evaluated with a PV diagram including emax, a ratio of left ventricular pressure to volume at the end systole. A normal heart, myocardial infarction, and postoperative heart were built on the finite element method (FEM). It was assumed that the ventricular wall of the model is composed of one-layer, elastic and isotropic material. We employed the Windkessel circulation model in order to compute PV diagrams. This paper presents the modeling method of a left heart on FEM, the simulation method, and an online output of the cardiac function calculations without FEM. Realistic trends of a PV diagram before and after left ventricular plasty surgery are computed.
日本コンピュータ外科学会の論文