A first aid charity is launching an appeal to get businesses to save lives - with heart defibrillators at work.
The Have a Heart campaign will see Derbyshire's St John Ambulance urging businesses in the area to sign up.
About 300 people in Derbyshire went into hospital with heart attacks between April 2004 and March 2005.
According to the charity, if the heart is shocked with a defibrillator within the first five minutes of an attack, survival rates shoot up from 5% to 50%.
St John Ambulance research also shows that workplaces are failing to install this type of life-saving, medical equipment.
Eric Pugh, marketing manager for Derbyshire St John Ambulance, said: "Anyone can use an AED (Automated External Defibrillator) but this research highlights an alarming lack of understanding among employers and employees."
He added that most people did not consider equipping their businesses with a defibrillator until after someone had suffered a heart attack at work.