New CPR Method | Medical News and Health Information
New CPR Method
(Ivanhoe Newswire) — According to the American Heart Association, emergency medical services (EMS) in the United States treat nearly 300,000 cardiac arrest cases a year that occur outside the hospital. Less than eight percent survive. However a new study has discovered that a shorter pause in CPR just before a defibrillator delivers an electric shock to a cardiac arrest victim’s heart drastically increases survival.
The researchers found the odds of surviving until released from the hospital were much lower for patients whose rescuers paused CPR for 20 seconds or more before delivering a shock, known as the pre-shock pause, and for patients whose rescuers paused CPR before and after defibrillation, known as the peri-shock pause for 40 seconds or more, compared to patients with a pre-shock pause of less than 10 seconds and a peri-shock pause of less than 20 seconds.
‘We found that if the interval between ending CPR and delivering a shock was over 20 seconds, the chance of a patient surviving was 53 percent less than if that interval was less than 10 seconds,’ Sheldon Cheskes, M.D., principal investigator of the study and assistant professor of emergency medicine at the University of Toronto was quoted saying. ‘Interestingly there was no significant association between the time from delivering a shock to restarting CPR, known as the post-shock pause, and survival to discharge. This led us to believe that a primary driver for survival was related to the pre-shock pause interval.’
The team also found that patients with peri-shock pauses of more than 40 seconds had a 45 percent decrease in survival when compared to those who had peri-shock pauses of less than 20 seconds.
Included in the study were 815 patients who suffered a cardiac arrest. The patients were treated with either an automated external defibrillator (AED) or a manual defibrillator. Researchers believe the study findings could prompt EMS providers and defibrillator manufacturers to adopt changes likely to increase the number of successful cardiac arrest resuscitations.
SOURCE: Circulation: Journal of the American Heart Association, June 21, 2011.