An Ottawa police officer is being credited for using a defibrillator to help save a man's life after a single vehicle collision in Kanata Friday morning.

The police officer, who carries a defibrillator in his patrol car, was first on the scene at Hazeldean Road and Terry Fox Drive just after 6:30 a.m.

The officer found a 56-year-old man unconscious in the driver's seat. He initiated CPR and then shocked the man with the defibrillator.

Paramedics arrived at the scene minutes later. They say the police officer's actions were key to saving the man's life.

"I think it's fantastic work on the part of the police officer this morning. He responded very, very quickly and put the machine on very quickly, and delivered two shocks," said J.P. Trottier, spokesperson for Ottawa paramedics.

The man was listed in critical condition in hospital this morning.