ERCP, Complications

Include pancreatitis (4%), hemorrhage (1%), cholangitis (1%), perforation (0.5%) and death (0.1%).

One study found the incidence of cardiac ischemia (based on ST changes) as high as 18%:
http://sfx.stanford.edu/local?sid=stanford:laneweb-search&id=pmid:20796149

Pneumothorax, pneumomediastinum have been reported

ERCP serves diagnostic and therapeutic purposes. Since the advent of magnetic resonance cholangiopancreatography (MRCP), use of ERCP for purely diagnostic purposes has declined

(Ellen Eaton MD, 9/28/10)