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Ocular ischemic syndrome is the constellation of ocular signs and symptoms secondary to severe, chronic arterial hypoperfusion to the eye. [1] Amaurosis fugax is a form of acute vision loss caused by reduced blood flow to the eye; it may be a warning sign of an impending stroke, as both stroke and retinal artery occlusion can be caused by thromboembolism due to atherosclerosis elsewhere in the ...
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.
The internal carotid artery supplies the brain, and the external carotid artery supplies the face. This fork is a common site for atherosclerosis, an inflammatory build-up of atheromatous plaque inside the common carotid artery, or the internal carotid arteries that causes them to narrow. [3] [4]
A vaso-occlusive crisis is a common painful complication of sickle cell anemia in adolescents and adults. [1] [2] It is a form of sickle cell crisis.Sickle cell anemia – most common in those of African, Hispanic, and Mediterranean origin – leads to sickle cell crisis when the circulation of blood vessels is obstructed by sickled red blood cells, causing ischemic injuries.
Diseases such as sickle cell anemia, which can lead to deformed red blood cells clogging blood vessels and impeding blood flow [9] Carotid artery stenosis, or narrowing of the carotid artery which can decrease the volume of blood flow to the brain [8]
Sickle cell disease (SCD), also simply called sickle cell, is a group of hemoglobin-related blood disorders that are typically inherited. [2] The most common type is known as sickle cell anemia. [2] Sickle cell anemia results in an abnormality in the oxygen-carrying protein haemoglobin found in red blood cells. [2]
443.21 Dissection of carotid artery; 443.22 Dissection of iliac artery; 443.23 Dissection of renal artery; 443.24 Dissection of vertebral artery; 443.29 Dissection of other artery; 443.8 Other specified peripheral vascular diseases 443.82 Erythromelalgia; 443.9 Peripheral vascular disease, unspecified; 444 Arterial embolism and thrombosis; 445 ...
The most common source of these athero-emboli is an atherosclerotic carotid artery. [11] However, a severely atherosclerotic carotid artery may also cause amaurosis fugax due to its stenosis of blood flow, leading to ischemia when the retina is exposed to bright light. [12] "Unilateral visual loss in bright light may indicate ipsilateral ...