Ambulance staff will walk out on Wednesday - but life-threatening emergencies will be responded to.
The ambulance walkouts will involve paramedics as well as control room staff and support workers.
Speaking to BBC Radio Four's Today programme, Welsh Ambulance Service CEO Jason Killings said about 15% of callouts were for issues which were immediately life threatening, although this varied across the regions. Mr Barclay has said the government's pay award met the requirements of the recommendations of the independent NHS Pay Review Body and what was being asked for was "unaffordable".
He added: "But I'm keen to continue a dialogue with the trade unions because there's a range of issues that matter to staff," he said, referring to issues such as technology and safety.
Danmark Seneste Nyt, Danmark Overskrifter
Similar News:Du kan også læse nyheder, der ligner denne, som vi har indsamlet fra andre nyhedskilder.
Army to be drafted in to cover for striking ambulance workersUnions have lashed out at the plans, claiming the military are not 'sufficiently trained' to plug staffing gaps on the front line.
Læs mere »
Grandfather lay on floor with nine shattered ribs for seven hours due to ambulance delaysKevan Smallman, 71, suffered serious injuries during a fall down his stairs at his home in from Tyldesley, Wigan
Læs mere »
Hospitals told to free up beds as NHS trusts brace for ambulance staff strikesThe Royal College of Emergency Medicine and the NHS providers have said freeing up beds will be difficult to do given winter pressures
Læs mere »
Hundreds of patients waiting for ambulance tonight as bosses issue new warning'We are still extremely busy and unfortunately, for those who have called us and need our urgent help, we're coming but there will be a wait'
Læs mere »
Consultation to launch on proposed closure of Air Ambulance base in WelshpoolA public consultation on the proposal to close the Air ambulance base in Welshpool will begin in January.
Læs mere »
'Max the miracle dog' helps fund Great North Air Ambulance vehicleThe springer spaniel, who died in April, helped raise £120,000 for an air ambulance SUV.
Læs mere »