Modeling to close of interatrium septum defects of the heart

Atrial septal defect (ASD) of the secundum type are the most common lesions. More than half of the century a surgeons are operating second defect of ASD of the heart. But a choice to close this defect have the empirical character. In this work the method of the modeling on computer was used. Were studied biomechanical properties of the interatrial septum in norm and with the defect, fnd the methods to close such defects: to close to the patch, sutured, endovascular close defects use device “Amplatzer septal occlude” (ASO). This models was build with accounting famous the size of the tension for every tissue structure. The models of the tension and motion were to came out. Than the results were compared. This results allowed the authors had to determinate the use of relapse of ASD after close of the defects with patchs, suture, and the device of the “ASO”. Most the tension and the motion appear in the oval pit of the septum were discovered. Was notice that the tension and the motion were decreased with increased the thickness this part of the septum. Therefore the second ASD must be close with the stuffs or devices which equal or greater than thickness the interseptum patch. In this connection the patch from any stuff are not better the method of the operation or the stuff is must be greater 1,5 than the area of the oval pit. When the defect is sutured there is great the tension and motion in the region of the suture. It is the danger of the relapse of the heart defect. When the defect is close the device of “ASO” there is small the tension and motion in the part of contact the device and interatrium septum that exclude the defect relapse.