By CBC News

Canadians who see an adult in cardiac arrest should "push fast and push hard" on the victim's chest, according to new CPR guidelines.

Cardiopulmonary resuscitation is a first-aid procedure for an unconscious person whose breathing or pulse have stopped.

CPR is traditionally defined as a combination of chest compressions and ventilation, also known as mouth-to-mouth resuscitation, with the aim of protecting the heart and brain until the heart resumes pumping in a normal rhythm.

But research suggests "hands-only" chest compression is enough to save a life. Based on a review of the latest evidence, the American Heart Association released new CPR guidelines Monday that will require everyone who has learned the ABCs of the lifesaving procedure to use a new formula.

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