A Study of Coronary Stent Thrombosis Growth.

In this study, the impact of thrombus growth at the left coronary ostium-resulting from a misplaced stent-was investigated through numerical simulations. Blood flow from the aortic root into the coronary arteries was modeled for several potential thrombus sizes to assess changes in pressure and shear stress caused by thrombus development. The results showed that even in the most severe case examined (with the thrombus growing three times its original size), the obstruction to the coronary cross-sectional area was not sufficient to produce a significant pressure drop or wall shear stress increases. This outcome is primarily attributed to the thrombus's location at the tip of the stent; even with considerable elongation, it did not significantly narrow the coronary artery's lumen. While the specific configurations studied did not result in critical obstruction, it is important to note that other thrombus shapes or positions could potentially block flow more severely, leading to substantial pressure drops in the left coronary arteries.