New York [US], March 29 (ANI): In a recent study, an international team of researchers found that those who get low doses of ionising radiation had a slightly increased lifetime risk of acquiring heart disease.

"The study suggests that radiation exposure, across a range of doses, may be related to an increased risk of not just cancer, as has been previously appreciated, but also of cardiovascular diseases," said Andrew Einstein, MD, PhD, professor of medicine at Columbia University Vagelos College of Physicians and Surgeons and one of the study's senior authors.

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"It should not steer people away from receiving radiation if necessary--in fact many medical uses of radiation are lifesaving--but it underscores the importance of ensuring that radiation is used appropriately and kept as low as reasonably achievable."

It's well known that exposure to high doses of radiation, from cancer therapy for example, can damage the heart. But firm evidence linking heart disease with low-dose radiation--encountered by workers in the nuclear industry or from diagnostic medical imaging--is less clear.

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The researchers used data from 93 studies covering all ranges of radiation exposures to find a relationship between dose and heart disease.

They found an increased excess lifetime risk of 2.3 to 3.9 cardiovascular deaths per 100 persons exposed to one Gy of radiation. (In the United States, about 25 out of every 100 people die from cardiovascular disease; a person exposed to 1 Gy of radiation will have a slightly higher, 27% to 29%, risk of dying from cardiovascular disease).

Few people other than those receiving radiation therapy will receive 1 Gy during their lives. But the researchers also found a higher risk of heart disease at low dose ranges (

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