Featured Research

from universities, journals, and other organizations

Using chest compressions first just as successful as immediate defibrillation after cardiac arrest, study finds

Date:
September 20, 2010
Source:
University of Michigan Health System
Summary:
In cardiac arrest, is it best to start pumping on the victim's chest or give an immediate shock to the heart? A new study has found that both rescue strategies are effective, yet chest compressions before defibrillation may be best in events where emergency response times are longer than five minutes.

Chest compressions before defibrillation in patients with sudden cardiac arrest is equally successful as immediate treatment with an electrical defibrillator, according to a new study by the University of Michigan Health System.

Few people who suffer cardiac arrest outside of a hospital survive. U-M physicians, along with a team of international experts, examined two promising rescue strategies: chest compressions first vs. defibrillation first.

Their results, published online in BMC Journal, show that both timing strategies are effective, yet chest compressions before defibrillation may be best in events where emergency response times are longer than five minutes.

"Current evidence does not support the notion that chest compressions first prior to defibrillation improves the outcome of patients in out-of-hospital cardiac arrest; instead it appears that both treatments are equivalent," says lead study author Pascal Meier, M.D., an interventional cardiologist at the U-M Cardiovascular Center.

One-year survival rates were higher among those who had chest compressions first. Data also suggests chest compressions may benefit cardiac arrests with a prolonged response time.

The study pooled data from four randomized trials that included a total of 1,503 patients. Researchers compared patient survival rates after emergency medical service providers performed at least 90 seconds of chest compressions before electrical defibrillation.

"The compressions-first approach appears to be as good as the defibrillation-first approach, especially if there are delays to EMS arriving on-scene," says senior author Comilla Sasson, M.D., an emergency medicine physician researcher at the University of Colorado. "This has major policy implications."

Sasson continues: "Our study shows that chest compressions matter so even more emphasis should be placed on doing high-quality chest compressions both by laypeople providing bystander CPR and EMS providers."

Sasson worked on the study while at the U-M where she created a body of work focused on out-of-hospital cardiac arrest and resuscitation, including demographic and racial differences in cardiac arrest survival.

EMS providers assess approximately 300,000 people with cardiac arrest in the United States each year. Only about 8 percent of people who have sudden cardiac arrest outside of a hospital survive. There's an urgent need to find ways to save lives of those whose heart has suddenly stopped beating.

When administered as soon as possible, chest compressions in conjunction with cardiopulmonary resuscitation, and, in some cases, rapid treatment with a defibrillator -- a device that sends an electric shock to the heart to try to restore its normal rhythm -- can be lifesaving.

When delivered by EMS professionals, CPR is a combination of rescue breathing and chest compressions to keep oxygen-rich blood circulating until an effective heartbeat is restored.

Bystanders are encouraged to immediately begin CPR using only chest compressions until professional help arrives, according to the American Heart Association.

In the coming weeks, the AHA is expected to launch its 2010 guidelines for CPR and emergency cardiovascular care.

"Based on our study, current guidelines emphasizing early defibrillation still are important," Meier says.

"However, since the outcomes with the chest compression-first approach were not inferior and might be even better in the long-term, and in case of longer response times, this study may have an impact on future guidelines."

Authors: Pascal Meier, M.D., U-M Health System, Paul Baker, Ph.D., SA Ambulance Service, Eastwood, South Australia, Australia; Daniel Jost, M.D., Service Medical D'Urgence, Paris, France; Ian Jacobs, Ph.D., Crawley Australia, Bettina Henzi, Department of Clinical Research, University of Bern Medical School, Bern Switzerland; Guido Knapp, Ph.D., Department of Statistics, TU Dortmund University, Germany; and Comilla Sasson, M.D., M.S., formerly of the U-M Health System.

Reference: "Chest compressions before defibrillation for out of hospital cardiac arrest: A meta-analysis of randomized controlled clinical trials," BMC Journal.

Funding: The study was supported by a research grant of the Swiss National Science Foundation.


Story Source:

The above story is based on materials provided by University of Michigan Health System. Note: Materials may be edited for content and length.


Cite This Page:

University of Michigan Health System. "Using chest compressions first just as successful as immediate defibrillation after cardiac arrest, study finds." ScienceDaily. ScienceDaily, 20 September 2010. <www.sciencedaily.com/releases/2010/09/100909003702.htm>.
University of Michigan Health System. (2010, September 20). Using chest compressions first just as successful as immediate defibrillation after cardiac arrest, study finds. ScienceDaily. Retrieved April 20, 2014 from www.sciencedaily.com/releases/2010/09/100909003702.htm
University of Michigan Health System. "Using chest compressions first just as successful as immediate defibrillation after cardiac arrest, study finds." ScienceDaily. www.sciencedaily.com/releases/2010/09/100909003702.htm (accessed April 20, 2014).

Share This



More Health & Medicine News

Sunday, April 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Nine-Month-Old Baby Can't Open His Mouth

Nine-Month-Old Baby Can't Open His Mouth

Newsy (Apr. 19, 2014) Nine-month-old Wyatt Scott was born with a rare disorder called congenital trismus, which prevents him from opening his mouth. Video provided by Newsy
Powered by NewsLook.com
'Holy Grail' Of Weight Loss? New Find Could Be It

'Holy Grail' Of Weight Loss? New Find Could Be It

Newsy (Apr. 18, 2014) In a potential breakthrough for future obesity treatments, scientists have used MRI scans to pinpoint brown fat in a living adult for the first time. Video provided by Newsy
Powered by NewsLook.com
Little Progress Made In Fighting Food Poisoning, CDC Says

Little Progress Made In Fighting Food Poisoning, CDC Says

Newsy (Apr. 18, 2014) A new report shows rates of two foodborne infections increased in the U.S. in recent years, while salmonella actually dropped 9 percent. Video provided by Newsy
Powered by NewsLook.com
Scientists Create Stem Cells From Adult Skin Cells

Scientists Create Stem Cells From Adult Skin Cells

Newsy (Apr. 17, 2014) The breakthrough could mean a cure for some serious diseases and even the possibility of human cloning, but it's all still a way off. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins