Soldiers came back from the Civil War with "irritable heart."

Da Costa himself called it irritable heart and the term soldier's heart was in common use both before and after his paper.

It is also variously known as cardiac neurosis, chronic asthenia, effort syndrome, functional cardiovascular disease, neurocirculatory asthenia, primary neurasthenia, subacute asthenia and irritable heart.

There are "bony hearts" and "hairy hearts," "irritable hearts" and "frosted hearts," "armored hearts" encased in a calcified shell and "bread-and-butter hearts" slathered in a fibrous ooze.