ChestCompressions:Most Important of CPR

Cardiopulmonaryresuscitation or CPR,can save the life of someone whose heart has stopped.The

condition is calledcardiac arrest.The heart stops pumping blood.The person stops breathing.Without

lifesavingmeasures,the brain starts to die within four to six minutes.CPR combinesbreathing into the

victim's mouth andrepeated presses on the chest._________(46)

However,a newJapanese study questions the usefulness of mouth-to-mouth breathing. The studywas

published in theBritish medical magazine,The Lancet. Doctors in Tokyo led the research.It examined more

than four thousandpeople who had suffered cardiac arrest.In all the cases,witnesses saw the eventhappen.

More than onethousand of the victims received some kind of medical assistance fromwitnesses.Seven

hundred and twelvereceived CPR. Four hundred and thirty-nine received chest pressesonly._______(47)

The researchers sayany kind of CPR improved chances of the patient's survival.But,they said thosepeople

treated with onlychest presses suffered less brain damage.Twenty-two percent survived with goodbrain

ability._________(48)

The American HeartAssociation changed its guidelines for CPR chest presses in 2005._________(49)

Gordon Ewy is aheart doctor at the University of Arizona College of Medicine in Tucson.Hewrote a report

that appeared withthe study.Doctor Ewy thinks the CPR guidelines should be changed again.He saidthe

heart associationshould remove rescue breaths from the guidelines.He argues that more witnessesto cardiac

arrests wouldprovide treatment if rescue breaths are not a part of CPR.He says this wouldsave lives,

_______(50)

Cardiac arrest killsmore than 300,000 people in the United States every year. The American Heart

Association saysabout ninety-five percent of victims die before they get to a medical center._________（48）

A.So far,we have notknown exactly yet whether mouth-to一mouth breathing is really useless in CPR.

B.Only ten percentof the victims treated with traditional CPR survived with good brain ability.

C.CPR keeps bloodand oxygen flowing to the heart and brain.

D.His studies showthat many people do not want to perform mouth-to-mouth breathing on a strangerfor fearof getting a disease.

E.It said neonleshould increase the number of chest presses from fifteen to thirty for everytwo breaths given.