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Purpose: At birth, there is a communication between the right and left ventricles, but this communication disappears after the birth. In some cases, the communication has been continued and ventricles cannot operate independently on each other. This abnormal communication causes problems, such as hypertension and heart valves complications. The purpose of this study was to analyse alterations in stress and strain caused by placement of a patch on junction and offering optimized geometry for it. Methods: For this purpose, fi nite element (FE) models of two types of circular and elliptical patches with the same material properties were established and the results of these two different geometries were calculated and compared. Results: Considering the same boundary and loading conditions, the results revealed that the elliptical patch triggers less stresses and is safe to use in ventricle compared to the circular one. Conclusion: The results of the concurrent study have implications not only for understanding of the magnitudes of the stress and strain because of a patch but also for providing an optimized geometry which brings about less complications. Klíčová slova: Deformace stěny Eliptická záplata Kruhová záplata Napětí stěny Srdeční komory

A numerical analysis on the right and left ventricles with circular and elliptical patches