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In medicine, describing a disease as acute denotes that it is of recent onset; it occasionally denotes a short duration.The quantification of how much time constitutes "short" and "recent" varies by disease and by context, but the core denotation of "acute" is always qualitatively in contrast with "chronic", which denotes long-lasting disease (for example, in acute leukaemia and chronic ...
Acute bleeds often develop after high-speed acceleration or deceleration injuries. They are most severe if associated with cerebral contusions. [3] Though much faster than chronic subdural bleeds, acute subdural bleeding is usually venous and therefore slower than the arterial bleeding of an epidural hemorrhage.
A venous hematoma may be acute (occurring within a day of the injury and appearing as a swirling mass of blood without a clot), subacute (occurring in 2–4 days and appearing solid), or chronic (occurring in 7–20 days and appearing mixed or lucent). [3] In adults, the temporal region accounts for 75% of cases.
The mechanism for chronic rejection is yet to be fully understood, but it is known that prior acute rejection episodes are the main clinical predictor for the development of chronic rejection. [6] In particular, the incidence increases following severe or persistent acute rejection, whereas acute rejection episodes with return to function back ...
Wounds can vary greatly in their appearance depending on wound location, injury mechanism, depth of injury, timing of onset (acute vs chronic), and wound sterility, among other factors. [ 1 ] [ 2 ] Treatment strategies for wounds will vary based on the classification of the wound, therefore it is essential that wounds be thoroughly evaluated by ...
Chronic wounds mostly affect people over the age of 60. [14] The incidence is 0.78% of the population and the prevalence ranges from 0.18 to 0.32%. [18] As the population ages, the number of chronic wounds is expected to rise. [30] Ulcers that heal within 12 weeks are usually classified as acute, and longer-lasting ones as chronic.
Infective endocarditis is divided into the three categories of acute, subacute, and chronic based on the duration of symptoms. [11] Acute infective endocarditis refers to the presence of signs and symptoms of infective endocarditis that are present for days up to six weeks. [11]
Acute pericarditis is more common than chronic pericarditis, and can occur as a complication of infections, immunologic conditions, or even as a result of a heart attack (myocardial infarction), as Dressler's syndrome. Chronic pericarditis however is less common, a form of which is constrictive pericarditis. The following is the clinical ...