Patients with a lethal heart rhythm problem have been thrown a lifeline thanks to a pioneering form of radiotherapy usually used to treat cancer. The procedure involves high-energy X-ray beams, called photons, being directed at an area of the heart to restore a normal pulse. While this may sound risky, early studies suggest it is highly effective in patients who have failed to respond to all other treatments, and leads to at least a 90 per cent improvement in symptoms.
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