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Posterior reversible encephalopathy syndrome; Other names: Reversible posterior leukoencephalopathy syndrome (RPLS) Posterior reversible encephalopathy syndrome visible on magnetic resonance imaging as multiple cortico-subcortical areas of T2-weighted hyperintense (white) signal involving the occipital and parietal lobes bilaterally and pons.
In hypertensive encephalopathy, generally the blood pressure is greater than 200/130 mmHg. [1] Occasionally it can occur at a BP as low as 160/100 mmHg. [ 4 ] This can occur in kidney failure , those who rapidly stop blood pressure medication , pheochromocytoma , and people on a monoamine oxidase inhibitor (MAOI) who eat foods with tyramine. [ 2 ]
Posterior reversible encephalopathy syndrome ... Blood pressure should be sufficient so as to sustain cerebral perfusion pressures greater than 60 mm Hg for optimal ...
Hypertensive encephalopathy: Arising from acutely increased blood pressure. Chronic traumatic encephalopathy: A progressive degenerative disease associated with repeated head trauma, often linked to contact sports. Lyme encephalopathy: Arising from Lyme disease bacteria, including Borrelia burgdorferi.
A hypertensive emergency is not based solely on an absolute level of blood pressure, but also on a patient's baseline blood pressure before the hypertensive crisis occurs. Individuals with a history of chronic hypertension may not tolerate a "normal" blood pressure, and can therefore present symptomatically with hypotension , including fatigue ...
In terms of environmental factors, dietary salt intake is the leading risk factor in the development of hypertension. [7] Salt sensitivity is characterized by an increase in blood pressure with an increase in dietary salt and is associated with various genetic, demographic, and physiological factors— African American populations, postmenopausal women, and older individuals carry a higher ...
Brain ischemia has been linked to a variety of diseases or abnormalities. Individuals with sickle cell anemia, compressed blood vessels, ventricular tachycardia, plaque buildup in the arteries, blood clots, extremely low blood pressure as a result of heart attack, and congenital heart defects have a higher predisposition to brain ischemia in comparison to the average population.
Hypertension (high blood pressure) is the most important contributing risk factor for stroke and cerebrovascular diseases as it can change the structure of blood vessels and result in atherosclerosis. [5] Atherosclerosis narrows blood vessels in the brain, resulting in decreased cerebral perfusion.