Navigation Links
Increase in survival when AED used less than 10 seconds after CPR pause

TORONTO, Ont., June 20, 2011--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 today 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.


Contact: Leslie Shepherd
St. Michael's Hospital

Related medicine news :

1. Sleep apnea may increase the risk of adverse pregnancy outcomes
2. Early exposure to pets does not increase childrens risk of allergies
3. Diversion of ambulances associated with increased risk of death for heart-attack patients
4. New method for measuring Parkinsons disease prevalence reveals sharp increase in Israel
5. Seniors abused during childhood face increased risk of sleep troubles
6. Study finds bankruptcy rates among cancer patients increase along with survival time
7. The best way to conquer migraine is to increase government research funding, headache specialists say
8. Childhood cancer survivors at increased risk of certain tumors in middle-age
9. Anorexic girls have increased bone density after physiological estrogen treatment
10. Bariatric surgery linked to increased fracture risk
11. Study links empathy, self-esteem, and autonomy with increased sexual enjoyment
Post Your Comments:
(Date:11/30/2015)... ... 2015 , ... The National Association of Professional Women (NAPW) honors ... Year Circle. She is recognized with this prestigious distinction for leadership in estate sales ... more than 850,000 members and over 200 operating Local Chapters. , “I’m pleased to ...
(Date:11/30/2015)... ... December 01, 2015 , ... Live ... offer individual vision insurance plans on . The multi-carrier insurance exchange ... and review products, allowing consumers to compare, quote and match plans to meet ...
(Date:11/30/2015)... , ... November 30, 2015 , ... ... (Meso Foundation) released information for caregivers and held two webinars on topics of ... on demand free of charge at . , With a loved ...
(Date:11/30/2015)... ... November 30, 2015 , ... Thermi™, a ... to announce that its ThermiRFR temperature controlled radiofrequency platform has received CE marking ... radiofrequency platform which uses temperature as a clinical endpoint. The technology has ...
(Date:11/30/2015)... Fla. (PRWEB) , ... November 30, 2015 , ... ... opened the driverless vehicle experience this summer, ushering in a new era of ... percent driverless and electric shuttle, will continue to offer guests an up-close look ...
Breaking Medicine News(10 mins):
(Date:11/30/2015)... 1, 2015 Express Scripts (NASDAQ: ESRX ) ... IMMY ) to drive access to a low-cost alternative to ... toxoplasmosis that has been recently priced out of reach for ... systems. --> --> Imprimis ... (a form of folic acid) for $1 per capsule for people ...
(Date:11/30/2015)... 2015 Die MEDTEC Japan ... für Entwicklung und Herstellung medizinischer Geräte, ... 2016 in Tokyo ... Foto:- Foto: ... Logo: --> ...
(Date:11/30/2015)... , December 1, 2015 ... adds "Endometriosis - Pipeline Review, H2 ... overview on therapeutic pipeline of Endometriosis and ... effective counter strategies to gain competitive advantage. ... targets and MOAs to produce first-in-class and ...
Breaking Medicine Technology: