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Heart Failure Health Center

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Studies: CPR Without Rescue Breathing OK

Bystanders Who Only Do Chest Compressions Save Nearly as Many, Researchers Find
By
WebMD Health News

July 28, 2010 -- Bystanders who perform CPR on patients with suspected heart attacks can safely skip the rescue breathing -- typically called mouth-to-mouth resuscitation -- and just perform the chest compressions, according to two new studies.

''We feel comfortable saying chest compressions alone, when performed by a layperson, will provide at least the benefit that conventional CPR, with rescue breathing, will provide," researcher Thomas D. Rea, MD, medical director for King County, Wash., Medic One, tells WebMD.

The suggestion to skip the mouth-to-mouth part of CPR, he emphasizes, does not apply to emergency medical personnel, but only to laypeople who may be able to provide CPR after a suspected heart attack while waiting for professional medical help to arrive.

Rea's study, along with another head-to-head comparison of the two CPR approaches, is published in the New England Journal of Medicine.

''We are trying urgently, desperately, to make CPR more accessible to bystanders," Rea says, noting that performing CPR soon after a heart attack can increase the likelihood of survival twofold. Hopefully, he says, the finding that the rescue breathing is not crucial will make the technique simpler and perhaps more palatable for people.

About CPR

CPR was first proposed about 50 years ago, when researchers suggested that external chest compression could provide blood circulation to the brain and heart after a heart attack. The mouth-to-mouth breathing was added later.

But in recent studies, researchers have focused on whether both components are always crucial. In 2008, the American Heart Association issued an advisory for the public, advocating hands-only CPR for bystanders not trained in CPR with rescue breathing.

CPR Techniques: The Studies

Rea's team evaluated 1,941 patients who had out-of-hospital heart attacks and were given CPR from bystanders being instructed by emergency dispatchers. Patients were randomly assigned to get either chest compression only or conventional CPR with rescue breathing.

The researchers looked at the percent in each group that survived to hospital discharge.

"We found that survival in the chest compression alone group was 12.5% and survival in the conventional CPR group was 11%," Rea tells WebMD.

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