10 doctors weighed in:
How/why does hyperventilation sometimes lead to syncope?
10 doctors weighed in

Dr. Mitchell Zeitler
Anesthesiology
3 doctors agree
In brief: Carbon dioxide
This is the main "driver" for us to breathe.
Co2 levels in the brain cause the respiratory center to signal breathing. When you hyperventilate you blow off a lot of co2 and the brain senses no need to breathe. Another driver is oxygen but since your o2 levels be high, the brain senses you have enough o2.

In brief: Carbon dioxide
This is the main "driver" for us to breathe.
Co2 levels in the brain cause the respiratory center to signal breathing. When you hyperventilate you blow off a lot of co2 and the brain senses no need to breathe. Another driver is oxygen but since your o2 levels be high, the brain senses you have enough o2.
Dr. Mitchell Zeitler
Dr. Mitchell Zeitler
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1 comment
Dr. Gregg Friedman
Gregg L. Friedman MD Psychiatrist agrees
Dr. Ricardo Borrego
Anesthesiology
3 doctors agree
In brief: Hyperventilation
Hyperventilation causes your body to eliminate the amount of carbon dioxide, which is a powerful vasoconstrictor. By causing vasoconstriction you reduce blood flow and oxygen delivery which can lead to fainting or syncope.

In brief: Hyperventilation
Hyperventilation causes your body to eliminate the amount of carbon dioxide, which is a powerful vasoconstrictor. By causing vasoconstriction you reduce blood flow and oxygen delivery which can lead to fainting or syncope.
Dr. Ricardo Borrego
Dr. Ricardo Borrego
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1 comment
Dr. Gregg Friedman
Gregg L. Friedman MD Psychiatrist agrees
Dr. Howard Lelvowitz
Internal Medicine
2 doctors agree
In brief: See below
Welcome hypervent can cause alkalosis of the body mess up acid base can cause you to faint.

In brief: See below
Welcome hypervent can cause alkalosis of the body mess up acid base can cause you to faint.
Dr. Howard Lelvowitz
Dr. Howard Lelvowitz
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