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Breast Cancer Radiation Has Long-Term Heart Effects: Study
Date:3/14/2013

By Kathleen Doheny
HealthDay Reporter

WEDNESDAY, March 13 (HealthDay News) -- Radiation treatment for breast cancer, given after breast-conserving surgery and sometimes after mastectomy, is known to reduce the risk of the cancer returning and death from the disease. But the therapy comes with its own risk.

The treatment has been found to increase the odds of developing heart disease later, through incidental radiation exposure to the heart. In a new study, researchers evaluated the magnitude of that risk.

"For the vast majority of my patients, I can reassure them about the risk to the heart," said Dr. Carolyn Taylor, a consultant clinical oncologist at the Clinical Trial Service Unit at the University of Oxford, in England.

"This is showing that, for the vast majority of women, the benefits of breast cancer radiation outweigh the risks [to the heart]," Taylor said.

The study is published in the March 14 issue of the New England Journal of Medicine.

The study did not, however, look at all types of heart problems linked with radiation therapy, nor did it consider chemotherapy, which also has been linked with heart problems later, said Dr. Javid Moslehi, who wrote an editorial accompanying the study.

Women should be aware of all these heart disease risks after radiation treatment to the breast, said Moslehi, director of the cardio-oncology program at Dana-Farber Cancer Institute and Brigham and Women's Hospital in Boston.

For the study, Taylor's team evaluated more than 2,100 women who had radiation therapy for breast cancer in Sweden and Denmark between 1958 and 2001.

They evaluated nearly 1,000 women with major heart events and more than 1,200 women who did not have heart events and served as the comparison group.

Major heart events analyzed included heart attack, the need to unblock or replace blocked blood vessels to the heart, or death from ischemic heart disease
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