The initiative included training and a "3 Steps for Life" programme, which taught participants how to perform CPR and use AEDs. Almost 50 AEDS had now been distributed across the country since 2015.
St John medical director Dr Tony Smith said around 1800 people were treated for a cardiac arrest that occurred in the community every year. Survival was largely due to the quick actions of bystanders who initiated CPR and used an AED within the first few minutes.
"The more people who know how to do CPR and have access to an AED in the community, the greater the chances of patient survival," he said.
"For every minute without CPR or defibrillation, a patient's chance of survival falls by 10-15 per cent."
AEDs deliver a short, powerful electric shock to the heart, helping it to regain its natural rhythm. Automatic voice prompts guide the user through the procedure, enabling efficient CPR to be administered in conjunction with AED use.
The locations of AEDs around the country are registered at www.aedlocations.co.nz, and can be found via an online map.