What is vasovagal syndrome?
Vasovagal syncope (vay-zoh-VAY-gul SING-kuh-pee) occurs when you faint because your body overreacts to certain triggers, such as the sight of blood or extreme emotional distress. It may also be called neurocardiogenic syncope. The vasovagal syncope trigger causes your heart rate and blood pressure to drop suddenly.
What causes a vasovagal response?
Vasovagal syncope is caused by a sudden drop in blood pressure, often triggered by a reaction to something. This causes your heart to slow down for a short time. As a result, your brain may not get enough oxygen-rich blood, which causes you to pass out. Vasovagal syncope is typically not a serious health condition.
How long does a vasovagal episode last?
Syncope is more common than you might think. It can happen at any age, including childhood, though fainting happens more frequently to people as they get older. Syncopal episodes usually last only seconds or minutes. They may be accompanied by temporary feelings of confusion when you regain consciousness.
What does Presyncopal mean?
Presyncope or near-syncope is often ill-defined and may have different meanings to different providers but denotes near fainting or a prodrome of syncope. The most uniform definition is “feeling like one was going to pass out but without actual loss of consciousness.” Near syncope can last for seconds to minutes.
What is near fainting called?
Fainting (syncope) is a temporary loss of consciousness (passing out).
Why do I pass out when I poop?
But straining lowers the volume of blood returning to the heart, which decreases the amount of blood leaving it. Special pressure receptors in the blood vessels in the neck register the increased pressure from straining and trigger a slowing of the heart rate to decrease in blood pressure, leading people to faint.
Why do I feel like Im going to pass out when I cough?
Cough syncope, also called “tussive syncope”, is a well-recognized syndrome for about 70 years, in which loss of consciousness usually occurs immediately after a violent cough or prolonged bouts of violent coughing, lasting for seconds with rapid restoration of full consciousness.
What does it mean when your pupils are slightly dilated?
If your pupils are significantly larger than these norms, you have dilated pupils. A dilated pupil sometimes can still react to light — that is, get smaller in bright light or when a light is shined at the eye. But typically, dilated pupils don’t respond normally to light.
How does parasympathetic stimulation cause pupil dilation?
Stimulation of the parasympathetic system, known for “rest and digest” functions, causes constriction. Inhibition of the parasympathetic system can therefore also cause dilation. The size of your pupils at any given time reflects balance of these forces acting simultaneously.
What is consensual pupillary response?
The consensual pupillary response is the constriction that normally occurs in a pupil when light is shown into the opposite eye.6 Because of this response, the trauma nurse should wait for several sec- onds before assessing pupillary light reflex in the second eye, as that pupil may be temporarily constricted.
What does it mean when your pupils are sluggish?
The speed of pupillary reactivity is recorded as brisk, sluggish, or nonreactive. Normally, pupils should constrict briskly in response to light. A sluggish or slow pupillary response may indicate increased ICP, and nonreactive pupils are often associated with severe increases in ICP and/or severe brain damage.