eMedicine - Hyperventilation Syndrome 
Condition in which minute ventilation exceeds metabolic demands, resulting in hemodynamic and chemical changes that produce characteristic symptoms. Information about this disorder including possible treatment.
http://www.emedicine.com/emerg/topic270.htmMedlinePlus Medical Encyclopedia: Rapid breathing
Provides information about this disorder.
http://www.nlm.nih.gov/medlineplus/ency/article/003071.htm
Physiotherapy for Hyperventilation
Information and contacts about hyperventilation compiled and maintained by chartered physiotherapists specialised in the management of breathing pattern disorders.
http://www.physiohypervent.org/
eMedicine Health - Hyperventilation
Consumer health resource center providing information on the causes, symptoms, and treatment.
http://www.emedicinehealth.com/articles/18951-1.asp
