A consultant at University Hospital Waterford says the South East of the country is uniquely disadvantaged when it comes to cardiac care.
Dr Rob Landers has criticised a clinical review which suggests that another cath lab is not needed at University Hospital Waterford.
Junior Minister John Halligan is embroiled in a row with the Government over the issue and has threatened to resign if services are not improved.
Health Minister Simon Harris has said that he considers the matter closed - but Dr Landers is adamant they are wrong.
"The South East is uniquely disadvantaged," he said.
"There are two major urban areas in Wexford and in Waterford - that populations in the South East is not within 90 minutes of a cath lab, unless there were an air ambulance service provided to get to patients there."