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CPR is unlikely to restart the heart; its main purpose is to maintain a flow of oxygenated blood to the brain and the heart, thereby delaying tissue death and extending the brief window of opportunity for a successful resuscitation without permanent brain damage. Advanced life support and defibrillation, the administration of an electric shock to the heart, is usually needed for the heart to restart, and this only works for patients in certain heart rhythms, namely ventricular fibrillation or ventricular tachycardia, rather than the 'flat line’ systolic patient although CPR can help bring a patient in to a shock able rhythm.
CPR is generally continued, usually in the presence of advanced life support (such as from a medical team or paramedics), until the patient regains a heart beat (called "return of spontaneous circulation" or "ROSC") or is declared dead.
1) CALL
Check the victim for unresponsiveness. If there is no response, Call 102 and return to the victim. In most locations the emergency dispatcher can assist you with CPR instructions.
2) BLOW
Tilt the head back and listen for breathing. If not breathing normally, pinch nose and cover the mouth with yours and blow until you see the chest rise. Give 2 breaths. Each breath should take 2 seconds.
3) PUMP
If the victim is still not breathing normally, coughing or moving, begin chest compressions. Push down on the chest 1 1/2 to 2 inches 30 times right between the nipples. Pump at the rate of 100/minute, faster than once per second.
CONTINUE WITH 2 BREATHS AND 30 PUMPS UNTIL HELP ARRIVES
NOTE: This ratio is the same for one-person & two-person CPR. In two-person CPR the person pumping the chest stops while the other gives mouth-to-mouth breathing.
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