Featured Research

from universities, journals, and other organizations

Every second counts when performing CPR: Increase in survival when AED used less than 10 seconds after CPR pause

Date:
June 21, 2011
Source:
St. Michael's Hospital
Summary:
A new study has found the number of people who survive after suffering a cardiac arrest outside a hospital drops significantly if the pause between stopping CPR and using a defibrillator to administer an electric shock is longer than 20 seconds.

Every second counts when performing CPR. A new study has found the number of people who survive after suffering a cardiac arrest outside a hospital drops significantly if the pause between stopping CPR and using a defibrillator to administer an electric shock is longer than 20 seconds.

The number of people who survive rises significantly if the pause is less than 10 seconds.

"If your pre-shock pause is over 20 seconds, the chances of surviving to reach a hospital, be treated and be discharged are 53 per cent less than if the pause is less than 10 seconds." said Dr. Sheldon Cheskes, lead author of the study published June 20 in Circulation: Journal of the American Heart Association.

Looking at the data another way, Cheskes said researchers found an 18 per cent drop in the number of patients surviving to be discharged from hospital for every five second increase in the pause between CPR and providing a shock with a defibrillator.

Cheskes is a collaborative investigator at the Li Ka Shing Knowledge Institute of St. Michael's Hospital as well as medical director for the Sunnybrook Osler Centre for Prehospital Care.

Cheskes said he hoped the findings would encourage paramedics to minimize any interruption in CPR. He'd also like to see manufacturers produce new software to shorten the length of time it takes to analyze a patient's heart rhythm and charge the defibrillator before delivering a shock. He said more paramedics should be trained to use defibrillators on manual mode rather than automatic to also speed up those two steps.

The researchers examined the files of 815 patients who suffered an out-of-hospital cardiac arrested between December 2005 and June 2007. The data was gathered by the Resuscitation Outcomes Consortium (ROC), a group of 11 Canadian and U.S. regional clinical centres including more than 200 EMS/fire agencies that carry out research related to cardiac arrest resuscitation and life-threatening traumatic injury. The Toronto centre, Rescu, is based at St. Michael's.

ROC's main funders include the Heart and Stroke Foundation of Canada and the Canadian Institutes of Health Research.

"Currently in Canada, less than five per cent of people survive an out-of hospital cardiac arrest," said Manuel Arango, director of health policy for the Heart and Stroke Foundation. "New techniques from the Resuscitation Outcomes Consortium have the potential to dramatically increase these odds. To date, ROC research has tripled survival rates in their test communities − revolutionizing how healthcare professionals do CPR in the field."

"The Canadian Institutes of Health Research are proud to support this resuscitation study," said Dr. Jean Rouleau, Scientific Director of the Institute of Circulatory and Respiratory Health. "When these findings are translated into practice, they will have the potential to save countless lives in Canada and throughout the world."

Cheskes said previous smaller studies showed the length of time between CPR and delivering an electric shock affected whether the patient's heart rhythm was restored. This was the first study to show it impacted how many not only made it to the hospital for treatment but also survived and were discharged.

The study found the length of time between delivering a shock and resuming CPR had no significant impact on survival rates.


Story Source:

The above story is based on materials provided by St. Michael's Hospital. Note: Materials may be edited for content and length.


Journal Reference:

  1. Sheldon Cheskes, Robert H. Schmicker, Jim Christenson, David D. Salcido, Tom Rea, Judy Powell, Dana P. Edelson, Rebecca Sell, Susanne May, James J. Menegazzi, Lois Van Ottingham, Michele Olsufka, Sarah Pennington, Jacob Simonini, Robert A. Berg, Ian Stiell, Ahamed Idris, Blair Bigham, Laurie Morrison on behalf of the Resuscitation Outcomes Consortium (ROC) Investigators. Perishock Pause: An Independent Predictor of Survival From Out-of-Hospital Shockable Cardiac Arrest. Circulation, Jun 2011 DOI: 10.1161/CIRCULATIONAHA.110.010736

Cite This Page:

St. Michael's Hospital. "Every second counts when performing CPR: Increase in survival when AED used less than 10 seconds after CPR pause." ScienceDaily. ScienceDaily, 21 June 2011. <www.sciencedaily.com/releases/2011/06/110620183238.htm>.
St. Michael's Hospital. (2011, June 21). Every second counts when performing CPR: Increase in survival when AED used less than 10 seconds after CPR pause. ScienceDaily. Retrieved August 23, 2014 from www.sciencedaily.com/releases/2011/06/110620183238.htm
St. Michael's Hospital. "Every second counts when performing CPR: Increase in survival when AED used less than 10 seconds after CPR pause." ScienceDaily. www.sciencedaily.com/releases/2011/06/110620183238.htm (accessed August 23, 2014).

Share This




More Health & Medicine News

Saturday, August 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Newsy (Aug. 21, 2014) An experimental drug used to treat Marburg virus in rhesus monkeys could give new insight into a similar treatment for Ebola. Video provided by Newsy
Powered by NewsLook.com
Two US Ebola Patients Leave Hospital Free of the Disease

Two US Ebola Patients Leave Hospital Free of the Disease

AFP (Aug. 21, 2014) Two American missionaries who were sickened with Ebola while working in Liberia and were treated with an experimental drug are doing better and have left the hospital, doctors say on August 21, 2014. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
Cadavers, a Teen, and a Medical School Dream

Cadavers, a Teen, and a Medical School Dream

AP (Aug. 21, 2014) Contains graphic content. He's only 17. But Johntrell Bowles has wanted to be a doctor from a young age, despite the odds against him. He was recently the youngest participant in a cadaver program at the Indiana University NW medical school. (Aug. 21) Video provided by AP
Powered by NewsLook.com
American Ebola Patients Released: What Cured Them?

American Ebola Patients Released: What Cured Them?

Newsy (Aug. 21, 2014) It's unclear whether the American Ebola patients' recoveries can be attributed to an experimental drug or early detection and good medical care. 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