Can coma occur due to severe hyperventelation ( respiratory alkalosis ) ?

Can: Seizures and coma can result from severe respiratory alkalosis. Not a likely scenario unless patient is very ill with respiratory disease, poisoning, or has neurological compromise.

No: You might faint but then you would stop hyperventilating and you should then return to normal. What gets you so anxious?

No coma: Respiratory alkalosisis is a condition seen in patient with anxiety, hysteria and stress.The carbon dioxide level drop too low and the ph of the blood rise and become alkaline. The main symptoms are dizzines, bloating, confusion and seizures.Coma is not common.

No: Coma is a serious disorder of consciousness, long duration, usually due to severe trauma or sustained medical problems like liver disease. You can have respiratory alkalosis while comatose by artificial ventilation (machine). Hyperventilation (from pain or anxiety)can cause someone to faint, but usually corrects when the person goes unconscious and doesn't continue to hyperventilate.

Not likely: Some may experience syncope or fainting due to hyperventilation, but the alkalosis should self correct reasonably quickly when hyperventilation stops, either voluntarily or as a result of loss of consciousness.