'heart-related' originates from the combination of 'heart' and 'related', where 'heart' refers to the organ and 'related' means connected or associated with.

'Heart' comes from Old English 'heorte', and 'related' comes from Latin 'relatus', meaning 'brought back'.

Initially, 'heart-related' meant anything associated with the heart organ, and this meaning has largely remained the same in modern usage.