Search results
Results from the WOW.Com Content Network
Watershed stroke symptoms are due to the reduced blood flow to all parts of the body, specifically the brain, thus leading to brain damage. Initial symptoms, as promoted by the American Stroke Association, are FAST, representing F = Facial weakness (droop), A = Arm weakness (drift), S = Speech difficulty (slur), and T = Time to act (priority of intervention).
Other symptoms include hoarseness, nausea, vomiting, a decrease in sweating, problems with body temperature sensation, dizziness, difficulty walking, and difficulty maintaining balance. Lateral medullary syndrome can also cause bradycardia, a slow heart rate, and increases or decreases in the patient's average blood pressure. [2]
High blood pressure accounts for 35–50% of stroke risk. [110] Blood pressure reduction of 10 mmHg systolic or 5 mmHg diastolic reduces the risk of stroke by ~40%. [111] Lowering blood pressure has been conclusively shown to prevent both ischemic and hemorrhagic stroke. [112] [113] It is equally important in secondary prevention. [114]
Middle cerebral artery syndrome is a condition whereby the blood supply from the middle cerebral artery (MCA) is restricted, leading to a reduction of the function of the portions of the brain supplied by that vessel: the lateral aspects of frontal, temporal and parietal lobes, the corona radiata, globus pallidus, caudate and putamen.
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.
Failing to maintain blood pressure can result in inadequate blood flow to the brain. [23] Blood pressure may be kept at an artificially high level under controlled conditions by infusion of norepinephrine or similar drugs; this helps maintain cerebral perfusion. [115] Body temperature is carefully regulated because increased temperature raises ...
A thrombus or embolus plugs an artery so there is a reduction or cessation of blood flow. This hypoxia or anoxia leads to neuronal injury, which is known as a stroke. The death of neurons leads to a so-called softening of the cerebrum in the affected area. [citation needed] [3]
Global aphasia typically results from an occlusion to the trunk of the middle cerebral artery (MCA), [2] which affects a large portion of the perisylvian region of the left cortex. [7] Global aphasia is usually a result of a thrombotic stroke, which occurs when a blood clot forms in the brain's blood vessels.