Complications cause very little mortality among patients undergoing PCI, according to a University of Michigan Cardiovascular Center study. The study found 1.54% of the 5,520 procedures evaluated resulted in death, and of those, procedural complication was the circumstance of death in only 7.1% of cases. Most of the deaths were caused by conditions that predated the procedure, said researcher Dr. Hitinder Gurm. Gurm and SCAI member Dr. Ajay Kirtane cautioned against using mortality as a metric for PCI performance. "We need to do a better job of figuring out what metrics translate most directly from PCI-related complications," Kirtaine said.