Arrhythmogenic Cardiomyopathy is a congenital heart condition, which causes cells in the heart muscle to become damaged and develop deposits of fat and scar tissue. An affected heart often cannot pump blood around the body properly when the muscle is put under stress, for example during exercise. The condition is a principal cause of sudden death in young people, many of whom would previously have been regarded as fit and healthy.

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Diagnosis of the disease is especially difficult, because the changes to the heart muscle are often very minor. Many of the changes and symptoms of Arrhythmogenic Cardiomyopathy can also be caused by a number of other conditions, many of which are harmless. It is said that 12 people under the age of 30 die from undiagnosed heart conditions each week in the UK alone, and instances of the disease are increasing.