An analysis of data taken from nearly 900 hospitals across the U.S. found percutaneous coronary intervention rates more than 24 hours after a heart attack in patients with blocked arteries had not significantly changed since a 2006 trial questioned the benefit of PCI in such cases. Dr. Barry Kaplan, vice chairman of cardiology at North Shore University Hospital in Manhasset, N.Y., and Long Island Jewish Medical Center in New Hyde Park, N.Y., said with guidelines having been changed in December 2007, the data analysis -- which spanned from 2005 to 2008 -- may have been conducted too soon to pick up on any change in trend.

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