A 20% reduction in the average time heart attack patients wait before treatment with PCI did not reduce death rates between 2005 and 2009, according to a study in the New England Journal of Medicine. However, experts noted other metrics including future cardiovascular conditions and quality of life measures might show benefits to faster treatment, and the study found the rate of death among patients who weren't treated within 90 minutes was about twice that of those who received treatment more quickly. SCAI President Dr. Theodore Bass noted that those who are treated quickly and lose less heart muscle may have a better chance of avoiding chronic heart failure in the future.

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