Diagnosis
Although it is listed in the ICD-9 (306.2) and ICD-10 (F45.8) under "somatoform autonomic dysfunction", the term is no longer in common use by any medical agencies and has generally been superseded by more specific diagnoses. The orthostatic intolerance observed by Da Costa has since also been found in patients diagnosed with chronic fatigue syndrome, postural orthostatic tachycardia syndrome (POTS) and mitral valve prolapse syndrome. In the 21st century, this intolerance is classified as a neurological condition. Exercise intolerance has since been found in many organic diseases. Classification
There are many names for the syndrome, which has variously been called soldiers heart, cardiac neurosis, chronic asthenia, effort syndrome, functional cardiovascular disease, neurocirculatory asthenia, primary neurasthenia, and subacute asthenia. Da Costa himself called it irritable heart  and the term soldiers heart was in common use both before and after his paper. Most authors use these terms interchangeably, but some authors draw a distinction between the different manifestations of this condition, preferring to use different labels to highlight the predominance of psychiatric or non-psychiatric complaints. For example, Oglesby Paul writes that "Not all patients with neurocirculatory asthenia have a cardiac neurosis, and not all patients with cardiac neurosis have neurocirculatory asthenia." None of these terms have widespread use. Treatment
The report of Da Costa shows that patients recovered from the more severe symptoms when removed from the strenuous activity or sustained lifestyle that caused them.
Reactions
Heating Zn(CH3CO2)2 in a vacuum results in a loss of acetic anhydride, leaving a residue of "basic zinc acetate," with the formula Zn4O(CH3CO2)6. It can also be prepared by a reaction of glacial acetic acid with zinc oxide. The cluster compound has a tetrahedral structure with an oxide ligand at its center  Basic zinc acetate is a common precursor to metal-organic frameworks (MOFs). See also
Basic beryllium acetate - isostructural with basic zinc acetate


== References ==