In nearly a third of cases of sudden cardiac arrest in the hospital, the staff takes too long to respond, increasing the risk of brain damage and death, a new study finds.

Researchers estimate that the delays contribute to thousands of deaths a year in the United States.

The study was based on the records of 6,789 patients at 369 hospitals whose hearts stopped because of conditions that could be reversed with an electrical shock from a defibrillator — a favorite device in TV hospital dramas, when a “code blue” is called and doctors and nurses come running with a crash cart and paddles to shock the victim back to life.

In the real world, doctors and nurses do not always run fast enough. Expert guidelines say the shock should be given within two minutes after the heart stops, but the study found that it took longer in 30 percent of the cases.

http://www.nytimes.com/2008/01/03/health/research/03heart.html?_r=2&ref=us&oref=slogin&oref=slogin