IVC filter migration to heart 

 Source: Inferior Vena Cava Filter Migration to the Right Ventricle: A Case Report and Review of Filter Migration and Misdeployment - Volume 2, Number 5, October 2011, pages 201-205 

weblink to source: http://www.journalmc.org/index.php/JMC/article/viewArticle/240/194

Figure. Lateral chest radiograph showing the location of the IVC filter in the heart (arrow).