hyperventilation
You have correctly spelled hyperventilation.
Yes, it can be dangerous, most people think that hyperventilation is due to getting little oxygen, but its not, hyperventilation is caused by having to much oxygen, that is why when putting a paper bag over your mouth helps, because you are breathing back in all the carbon dioxide that you exhaled, and this helps to balance out the oxygen. Hyperventilation can cause you to pass out.
Tachypnea
They are not the same. Hyperventilation can be a symptom of anxiety.
Yes, hyperventilation is can cause dead things.
Yes, chest tightness can be due to hyperventilation. More specifically is it due to Hyperventilation Syndrome which is a respiratory disorder caused by the psyche.
Some sort of psychological stress can trigger hyperventilation syndrome.
As a sufferer of hyperventilation I would say it does. Not massively though but you can feel the difference.
No, hyperventilation means increased rate and depth of breathing.
Hyperventilation raises body pH. Hypoventilation lowers body pH.
hyperventilation