The King died in 1977 aged 42, after becoming addicted to prescription drugs and junk food. But a new investigation has suggested he was suffering from hypertropic cardiomyopathy, which causes heart failure by weakening the organ's muscle.

Dr Stephen Kingsmore, a specialist based in Kansas City, examined DNA extracted from a strand of Presley's hair which had been kept by his barber.

He found evidence of variations in the icon's genes known to cause the heart condition, and others that may have contributed to the weight, headache and eyesight problems he suffered towards the end of his life. - more on this story

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