TCTMD -- Over a 7-year period beginning in 2000, the elderly made up an increasingly higher proportion of patients undergoing nonemergent percutaneous coronary intervention (PCI) in Scotland, as clinicians began to expand treatment to higher risk cases. Yet the likelihood of adverse events among this changing patient population remained steady over time, reports a study published online July 6, 2010, ahead of print in Circulation: Cardiovascular Interventions.