Ischemia

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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 ?
Taurine attenuates multiple organ injury induced by intestinal ischemia reperfusion in rats.
2) Nevertheless, to our knowledge, intestinal ischemia has not been described following spinal surgery via the posterior approach.
Protective role of adiponectin in a rat model of intestinal ischemia reperfusion injury.
The intestinal ischemia was established by occluding the superior mesenteric artery (SMA) and confirmed by immediate blanching of the small intestine and cecum.
Conclusion: Since we have not observed any intestinal ischemia through our research, slight changes of I-FABP measurements make us believe that I-FABP would be a valuable way to monitor for intestinal ischemia in patients who undergo cardiac surgery.
Intestinal ischemia in patients in whom small bowel obstruction is suspected: Evaluation of accuracy, limitations, and clinical implications of CT in diagnosis.
Key Words: colon, hematochezia, intestinal ischemia
Gary Della 'Zanna of the FDA's division of drug risk evaluation in Rockville said that additional cases of ischemic colitis or other forms of intestinal ischemia had been reported the label change.
Gary Della'Zanna of the FDA's division of drug risk evaluation in Rockville said additional cases of ischemic colitis or other forms of intestinal ischemia had been reported since the label change was made.
Additional medical indications characterized by poor perfusion where Cardio Vascu-Grow(TM) could have a potential beneficial effect include chronic back pain caused by blockage of lumbar arteries and intestinal ischemia where arteries in the small and large intestines become obstructed.
1,2,4,8] Hypotheses to explain duplications include persistence of embryonic diverticula, fusion of embryologic longitudinal folds, abortive twinning, intrauterine intestinal ischemia, and sequestration of embryonic tissues during embryonic movements.
Effect of aging on intestinal ischemia and reperfusion injury.