Millions of people have been trained in CPR in recent decades, yet when people who aren’t in hospitals collapse from a sudden cardiac arrest, relatively few bystanders attempt resuscitation. Only one-fourth to one-third of those who might be helped by CPR receive it before paramedics arrive.
With so many people trained, why isn’t bystander CPR done more often?
For one thing, people forget what to do: the panic that may ensue is not conducive to accurate recall. Even those with medical training often can’t remember the steps just a few months after learning them. Rather than make a mistake, some bystanders simply do nothing beyond calling 911, even though emergency dispatchers often tell callers how to perform CPR.
Then there is the yuck factor: performing mouth-to-mouth resuscitation on a stranger. So pervasive is the feeling of reluctance that researchers decided to study whether rescue breathing is really necessary.
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On this subject though - it is important, too, that everyone consider the importance of AEDs - CPR doesn't generally really "Resuscitate" as the name would imply, but rather maintains stasis until an AED or other advanced lifesaving practices are applied.
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Two major studies, published in The New England Journal of Medicine in July 2010, clearly demonstrated that chest compressions alone were as good or even better than combining them with rescue breathing. In both studies, one conducted in Washington State and London and the other in Sweden, a slightly higher percentage of people who received only bystander chest compressions survived to be discharged from the hospital with good brain function.
When a person collapses suddenly because the heart’s electrical function goes awry, it turned out, there is often enough air in the lungs to sustain heart and brain function for a few minutes, as long as blood is pumped continuously to those vital organs. In addition, some people gasp while in cardiac arrest, which can bring more oxygen into the lungs. Indeed, the studies strongly suggested that interrupting chest compressions to administer rescue breaths actually diminishes the effectiveness of CPR in these patients.
Based in part on these findings, the American Heart Association has removed rescue breathing from bystander CPR guidelines for teenagers and adults in sudden cardiac arrest.
About 900 Americans die every day because of sudden cardiac arrest. Nearly 383,000 of such episodes occur outside hospitals each year, 88 percent of them at home. Thus, the life you save with CPR may well be a relative’s.
Sudden cardiac arrest is not the same as a heart attack. A victim of sudden cardiac arrest collapses suddenly, becomes unresponsive to gentle shaking and stops breathing normally. The arrest occurs when the heart’s electrical system malfunctions, resulting in highly irregular signals that leave the heart unable to pump blood. After just four minutes of this, the brain’s ability to recover from a lack of oxygen begins to seriously decline.
About 95 percent of people in sudden cardiac arrest die before reaching the hospital. Many of them were otherwise healthy. A victim’s chances of survival fall by 7 percent to 10 percent every minute the heart fails to pump.
Since 2010, the heart association has advocated a simplified version of bystander CPR. When encountering a person who has collapsed and is unresponsive, the most important emergency action — after yelling for someone to call 911 — is to administer rapid, forceful chest compressions until medical help arrives or an automated external defibrillator, or A.E.D., can be used to shock the heart back into a normal rhythm.
Put one hand over the other, with fingers entwined, place them in the center of the chest between the victim’s nipples, and press hard and fast. Each compression should depress the chest by about two inches and should be repeated about 100 times a minute. If done to the beat of “Staying Alive,” the old Bee Gees song, the proper rhythm will be achieved. The chest should be allowed to rise up momentarily between compressions to allow the heart and lungs to refill.
You don’t have to take a course to learn compression-only CPR. You can prepare by watching a video by the American Heart Association. Search online for “hands-only CPR instructional video,” or check out the association’s web page on the topic. There are also free mobile training apps available for iPhone and Android phones.
Chest compressions alone should be done only for teenagers and adults in sudden cardiac arrest. Conventional CPR, with rescue breathing, is still recommended for infants and younger children. The combination should also be used for teenagers and adults in cardiac arrest who collapsed unobserved and may not have any air left in their lungs, as well as for victims of drowning, drug overdose or collapse because of a breathing problem.
The heart association has changed the recommended protocol for conventional CPR in hopes of improving its effectiveness. The current recommendation is to start with 30 chest compressions (at a rate of 100 a minute) followed by two one-second breaths, repeating this sequence until help arrives.
When providing breaths, the victim’s head should be tilted back to open the airway. For an infant, the rescuer’s mouth should completely cover the baby’s nose and mouth. For children older than 1 and for adults, the victim’s nose should be pinched and the mouth completely covered by the mouth of the rescuer, who should observe the chest rising with each rescue breath.