The research, by scientists at the University of Oxford and in Scandinavia, involved over 2,000 women treated with radiotherapy in Denmark and Sweden. Their study was able to calculate for the first time how much radiotherapy for breast cancer increases the risk of heart disease.
Heart risk after breast cancer radiotherapy smaller than thought
14 March 2013
Radiotherapy for breast cancer does involve an increase in risk of heart disease, but for most women it is very small and greatly outweighed by the benefits of treatment.