Death at cardiac catheterization: coronary artery embolization of calcium debris from Ionescu-Shiley bioprosthesis. The case described is a death due to embolization of calcium debris from a bioprosthesis, dislodged at cardiac catheterization. As more bioprosthetic valves are implanted, and more of them fail long-term with calcification, such complications of the invasive study of these valves may be expected. 