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This is the VOA Special English Health Report.

Cardio-pulmonary resuscitation, or CPR, can save the life of someone whose heart has stopped.

The condition is called cardiac arrest. The heart stops pumping blood. The

person stops breathing. Without lifesaving measures, the brain starts to die

within four to six minutes.CPR combines breathing into the victim's mouth and

repeated presses on the chest. CPR keeps blood and oxygen flowing to the heart

and brain.However, a new Japanese study questions the usefulness of

mouth-to-mouth breathing.The study was published in the British medical

magazine, The Lancet. Doctors in Tokyo led the research. It examined more than

four thousand people who had suffered cardiac arrest. In all the cases,

witnesses saw the event happen.More than one thousand of the victims received

some kind of medical assistance from witnesses.

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