Da Costa's syndrome (also known as "soldier's heart", cardiac neurosis, chronic asthenia, effort syndrome, functional cardiovascular disease, neurocirculatory asthenia, primary neurasthenia, subacute asthenia and irritable heart) is a psychiatric syndrome which presents a set of symptoms similar to those of heart disease. These include fatigue upon exertion, shortness of breath, palpitations, sweating, and chest pain.
While a physical examination does not reveal any gross physiological abnormalities, orthostatic intolerance has been noted. It was originally thought to be a cardiac condition, and treated with a predecessor to modern cardiac drugs. While the condition was eventually recategorized as psychiatric, in modern times, it is known to represent several disorders, some of which now have a known medical basis. For stress-related combat disorders generally, see post-traumatic stress disorder.
Historically, similar forms of this disorder have been noticed in various wars, like the American Civil War and Crimean war, and among British troops who colonized India. The condition was named after Jacob Mendes Da Costa who investigated and described the disorder in 1871.