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Acute radiation syndrome (ARS), also known as radiation sickness or radiation poisoning, is a collection of health effects that are caused by being exposed to high amounts of ionizing radiation in a short period of time. [1] Symptoms can start within an hour of exposure, and can last for several months.
In reality, orthostatic hypotension can cause vague symptoms (e.g. dizziness) which are similar to those caused by VBI; VBI should only be considered where the stenosis is severe and/or there are focal neurological symptoms specific to the posterior circulation. [6] VBI may also result from altered blood flow as seen in subclavian steal syndrome.
High doses can cause visually dramatic radiation burns, and/or rapid fatality through acute radiation syndrome. Controlled doses are used for medical imaging and radiotherapy . Most adverse health effects of radiation exposure may be grouped in two general categories:
Medical conditions like anxiety causes heavy-headedness too. [5] A sinus infection can cause facial pressure and pain, as well as nasal congestion and headaches, which are also known as heavy-headedness. [citation needed] New users to specific drugs can cause heavy-headedness. Chronic subjective dizziness (CSD) can be related to heavy-headedness.
High-LET radiation at doses that are below 0.5 Gy show greater relative biological effectiveness compared to low-LET radiation. [63] The acute effects on the CNS, which are associated with increases in cytokines and chemokines, may lead to disruption in the proliferation of stem cells or memory loss that may contribute to other degenerative ...
The term is now used to describe a psychological fear, but Westphal's original description included many symptoms of dizziness and imbalance not included in the modern psychiatric definition. Unlike people who feel anxious in crowds because they feel something bad will happen, people with CSD may dislike crowds because all the movement leads to ...
Three weeks later, the worker suffered symptoms typical of acute radiation syndrome (vomiting, loss of hair, fatigue). One estimate that he was exposed to a dose of between 4.4 and 4.8 Gy due to a malfunction of the control-command hydraulic system maintaining the radioactive source in the pool.
Neurovascular. This syndrome typically occurs at absorbed doses greater than 30 grays (3,000 rad), though it may occur at 10 grays (1,000 rad).[3] It presents with neurological symptoms like dizziness, headache, or decreased level of consciousness, occurring within minutes to a few hours, and with an absence of vomiting; it is invariably fatal.[3]"
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