FIGURES released by the Department of Health show that more than 6% of patients who are treated at University Hospital Limerick after suffering from heart attacks die within a month of being admitted.
The figures are contained in the first annual report of the National Healthcare Quality Reporting System, which measures the performance of the health service across a number of specific areas.
According to the report, between 2011 and 2013 the UL Hospitals Group had a mortality rate of 6.49% -just below the national average.
Of the 1,229 heart attack patients treated across the group 990 were treated at UHL, 119 at Nenagh, 66 at Ennis and 54 at St Johns.
While the mortality rates for UHL and Nenagh Hospitals are disclosed in the report, they have not been disclosed for Ennis Hospital or St Johns as the total number of cases is less than 100.
Elsewhere, the report shows the mortality rate of haemorrhagic stroke patients is above the national average.
The rate of death across the UL Hospitals group was 26.07% while the rate was 30.11% at UHL where 217 haemorrhagic stroke patients were treated between 2011 and 2013.
While there were considerably more incidents of ischaemic stroke, the rate of mortality of victims was relatively low at 10.62% across the UL Hospitals Group.
Other figures contained in the report show that more than 85.8% of patients who were admitted to UHL suffering from hip fractures underwent surgery within two days.
The rate of Caesarean Section conducted at University Maternity Hospital Limerick during 2013 was slightly above the national average and 30.8 per 100 births.
With over 4,500 births registered during the 12 month period, this equates to around 1,400 c-sections annually.