Exclusive: Scientists find a way to forecast hypertrophic cardiomyopathy, which affects millions worldwide

Scientists are developing a simple blood test to predict who is most at risk from the world’s most common inherited heart condition.

Millions of people worldwide have hypertrophic cardiomyopathy (HCM), a disease of the heart muscle where the wall of the heart becomes thickened. It is caused by a change in one or more genes and mostly passed on through families.