Researchers say a drug made in Arklow, Co Wicklow, could save thousands of lives if used to treat heart failure patients.
International research has found that the use of Ivabradine can reduce the risk of death and hospital admissions by more than 25%.
The drug is already used for the treatment of angina.
It works by slowing down the rate of a heart that is beating too fast.
Six Irish centres were involved in the research project, which was presented at the European Society of Cardiology annual meeting in Stockholm.