Cardioneurosis, which was colloquially known as soldier’s heart, is a syndrome with a set of symptoms that are similar to those of heart disease, though a physical examination does not reveal any physiological abnormalities. In modern times, Cardioneurosis is considered the manifestation of an anxiety disorder and treatment is primarily behavioral, involving modifications to lifestyle and daily exertion.
Cardioneurosis is also known as Da Costa’s syndrome. The condition was named after Jacob Mendes Da Costa, who investigated and described the disorder during the American Civil War. It is also variously known as cardiac neurosis, chronic asthenia, effort syndrome, functional cardiovascular disease, neurocirculatory asthenia, primary neurasthenia, subacute asthenia and irritable heart.