A retired Portlaoise Hospital consultant says not even the National Ambulance Services were aware of the location of existing devices.
There's now defibrillator in every town in Laois following a community campaign.
There's an estimated 10,000 defibrillators in Ireland, but emergency services only know the whereabouts of 2,000.
A group - set up by retired consultant surgeon Peter Naughton - have identified the location and access details for each one in Laois and passed their database onto the National Ambulance Service.
Peter says they were eager that the devices would be known to public and easy to access in case of emergency:
All of the details have been compiled on laoisdefib.com.
Calls Grow For 24 Hour Garda Station In Edenderry After Arson Attack
Appeal Date Set For Jozef Puska Over Murder Of Ashling Murphy
Offaly Town Demands Meeting With Garda Commissioner And Justice Minister
Ireland’s First Kidney Pancreas Transplant Recipient Dies Aged 68
Quality Of Life To Drive Offaly’s Appeal For Foreign Investment - Anna Marie Delaney
Hundreds Of Mourners Gather For Tadgh Farrell's Funeral
Dancing With The Stars ‘A Once In A Lifetime Opportunity’ - Rose Of Tralee
Uisce Éireann To Submit €6b Water Project Plan
Pedestrian Killed In Midlands Crash
Gardai Arrest Four Men Over Laois Prison Assault
Maura Higgins Set For Traitors US
Man Taken To Hospital Following Alleged Westmeath Assault
Osteoarthritis Programme Launched At Midlands Hospital
Laois County Fire And Rescue Service Welcomes Two New Fire Appliances
Offaly TD Welcomes New IDA Ireland Investment
Gardai Conduct House Searches In Connection With Offaly Arson Attack
Funeral For Offaly Arson Attack Victim To Be Held Today
Emergency Services At Scene Of Offaly Crash
Tadgh Farrell’s Father Denied Compassionate Bail To Attend Son’s Funeral