Ischemia

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Related to ischemic: transient ischemic attack, Ischemic cardiomyopathy, Ischemic heart disease, Ischemic optic neuropathy

ischemia

[i′skē·mē·ə]
(medicine)
Localized tissue anemia as a result of obstruction of the blood supply or to vasoconstriction.

Ischemia

 

a local deficiency of blood; insufficient blood in an organ or tissue because of the narrowing or complete occlusion of the lumen of an afferent artery.

Transitory ischemia (like hyperemia) may result from physiological regulation of the blood supply, such as in reflex spasm of an artery caused by a mental factor (fright); the influence of pain, cold, chemical substances (epinephrine, ergotin), and biological stimuli (bacteria, toxins); the obstruction of an artery by a thrombus or embolus; constriction of the lumen of a blood vessel in connection with an atherosclerotic or inflammatory process in the wall; or compression of an artery by a tumor, scar, or foreign body. The aftereffects of ischemia depend on the degree of disruption of the blood flow, the rate of development and duration of the ischemia, the sensitivity of the tissue to oxygen deficiency, and the general condition of the body. Ischemia may end in complete restoration of the structure and function of the affected organ or tissue, but it also may lead to necrosis (infarct). The central nervous system and heart muscle are particularly sensitive to ischemia.

N. R. PALEEV

References in periodicals archive ?
The future in acute ischemic stroke therapy most likely will consist of combination therapies (Bonnono et al.
The risk was even more pronounced among non-users of aspirin: those who ate the most trans fat were 66 percent more likely to have an ischemic stroke than females who ate the least trans fat.
In a logistic regression analysis that adjusted for a broad range of demographic and other confounding risk factors, infants born to mothers with hypertension had more than twice the risk of any stroke, defined as one or more diagnoses indicating ischemic stroke, before 30 days (odds ratio, 2.
The report provides a snapshot of the global therapeutic landscape of Ischemic Stroke.
Additional data showed that those women who had had an early miscarriage in a previous pregnancy were more likely than other new mothers to have died from or been hospitalized with ischemic heart disease between 1981 and 1999.
A total of 8 cases with reactive atypia were identified from 28 cases of ischemic colitis collected in that time frame.
These wounds may have an ischemic component as well.
A snapshot of the global therapeutic scenario for Ischemic Stroke.
The North America acute ischemic stroke diagnosis and treatment market accounted for the highest market share in 2013.
Researchers studied data from the Nationwide Inpatient Sample of the Healthcare Cost and Utilization Project on hospitalizations (not patients) for acute ischemic stroke from 1994 to 2007, based on hospital coding.
Ischemic wounds are a common complication of diabetes, high blood pressure, obesity and other conditions that can be characterized by poor vascular health.
Always correlate clinical findings and laboratory results with images of brain abnormalities to detect intracranial infections and to avoid attributing the infant's problems to hypoxic ischemic brain injury, said Dr.