New guidelines by the American Heart Association call for more chest compressions for victims of cardiac arrest.
The A-H-A now advises giving 30 chest compressions, instead of 15, for every two rescue breaths.
Studies show that chest compressions create more blood flow from the heart to the rest of the body, buying time until a defibrillator can be used or the heart can pump blood on its own.
The revised guidelines also recommend emergency personnel cool the body temperature of cardiac arrest patients to 90 degrees for 12 to 24 hours.
Research indicates a lower body temperature results in improved survival and brain function for those who are comatose after initial resuscitation.
More than 300-thousand Americans die each year of cardiac arrest.