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Causes range from non-serious to potentially fatal. [1] There are three broad categories of causes: heart or blood vessel related; reflex, also known as neurally mediated; and orthostatic hypotension. [1] Issues with the heart and blood vessels are the cause in about 10% and typically the most serious while neurally mediated is the most common. [1]
Making the correct diagnosis for loss of consciousness is difficult. The core of the diagnosis of vasovagal syncope rests upon a clear description of a typical pattern of triggers, symptoms, and time course. [citation needed] It is pertinent to differentiate lightheadedness, seizures, vertigo, and low blood sugar as other causes. [citation needed]
In cases of decreased or total loss of consciousness, the tongue can lose muscle tone and obstruct the upper airway. [2] Other potential causes of obstruction include tumors of the upper respiratory tract (oral cavity, pharynx, larynx), bodily fluids (blood, mucus, vomit), and trauma to the upper airway. [2]
An altered level of consciousness is any measure of arousal other than normal. Level of consciousness (LOC) is a measurement of a person's arousability and responsiveness to stimuli from the environment. [1] A mildly depressed level of consciousness or alertness may be classed as lethargy; someone in this state can be aroused with little ...
Respiratory arrest is the only lung condition to cause coma, but many different lung conditions can cause decreased level of consciousness, but do not reach coma. Other causes of coma include severe or persistent seizures, kidney failure, liver failure, hyperglycemia, hypoglycemia, and infections involving the brain, like meningitis and ...
A closed head injury severe enough to cause loss of consciousness is serious and can lead to death. Also, a gunshot wound doesn’t necessarily cause immediate death, there’s a lot of gasping ...
A 1994 report found that of those who were in a vegetative state a month after a trauma, 54% had regained consciousness by a year after the trauma, whereas 28% had died and 18% were still in the vegetative state. For non-traumatic injuries such as strokes, only 14% had recovered consciousness at one year, 47% had died, and 39% were still ...
Continued oxygen deprivation results in fainting, long-term loss of consciousness, coma, seizures, cessation of brain stem reflexes, and brain death. [7] Objective measurements of the severity of cerebral hypoxia depend on the cause. Blood oxygen saturation may be used for hypoxic hypoxia, but is generally meaningless in other forms of hypoxia ...