Could chronic hyperventilation syndrome be the cause of paresthesia in legs and sometimes arms? have had extensive testing but all results are normal

Panic attacks: My guess is that you have panic disorder. There is no such disease as chronic hyperventilation syndrome. A psychologist can help you with relaxation exercises. Also, meds are available which are very helpful in treating panic attacks. Here is a web site to check out: http://www.nimh.nih.gov/health/topics/panic-disorder/index.shtml

Very Likely: Hyperverventilation syndrome does exist (despite some opinions that it does not). It is commonly associated (but not always) with anxiety/panic disorder and agoraphobia. It can be over come usually with cognitive/behavioral therapy. See link http://emedicine.medscape.com/article/807277-overview Would also be concerned about conditions causing calcium or magnesium levels to be off. Best of luck