"Cause of Death Within 30 Days of Percutaneous Coronary Intervention in an Era of Mandatory Outcome Reporting"
Circ Jul 2013
http://content.onlinejacc.org/article.aspx?articleid=1687956
"Conclusions  Less than one-half of 30-day deaths are attributed to a PCI-related complication. Death certificates are inaccurate and do not report PCI-related deaths, which may represent a better marker of PCI quality."