Ambulance Victoria's Moyne and Warrnambool senior team manager Jo O'Connor-Ward said people were often fearful of being in a situation where someone's life needed to be saved.

"But once you know how to perform CPR or use a defibrillator, it can become a little less daunting," she said.

South-west paramedics teamed up with Port Fairy-Belfast Lions Club on Wednesday as part of Restart a Heart Day - an international event encouraging more people to learn how to perform CPR and use an automatic external defibrillator (AED).

The group set up a stall outside Port Fairy's IGA supermarket between 11am and 1pm.

Ms O'Connor-Ward said she often heard people being afraid of pushing too hard on the chest during CPR, or shocking a person with a defibrillator at the wrong time.

"But you can't make a mistake when administrating a shock because the AED assesses the person's heart rhythm for you," she said.

"If there's normal heart rhythm, an AED will not allow a shock to be delivered."

Passing community members were given a show bag filled with informative guides, fridge magnets and a pretend heart that showed people how hard to push on the chest when giving CPR.

People also had the opportunity to utilise a CPR manikin and ask questions.

Ms O-Connor-Ward said Wednesday's stall was also aimed at inviting more people to register for the GoodSAM phone application, which connects heart attack victims with trained first-aiders.

She said about eight people had shown interest interest in registering for the application.

Port Fairy-Belfast Lions Club member Sue Barnes said the lions club had recently partnered with Moyne Shire Council and Moyne Health Services to launch a defibrillator guide showing the locations of 29 defibrillators across Port Fairy.

"We also hosted an information night last year at the (Port Fairy) Bowls Club and a lot of people walked away saying 'now I feel like I can comfortably use (a defibrillator)'," she said.

Mrs Barnes said the Lions Club would hold further stalls and demonstrations at the Port Fairy Market and the Moyneyana Festival.

Ambulance Victoria attends more than 6000 cardiac arrests every year but only one in 10 survive.

Members of the public are encouraged to contact a local first aid provider to earn more about CPR and AEDs.

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