המשך
http://www.emedicine.com/emerg/topic270.htm HVS = hyperventilation syndrome GI = gastrointestinal tract HVS occurs in acute and chronic forms. Acute HVS accounts for only 1% of cases but is diagnosed more easily. Chronic HVS can present with a myriad of respiratory, cardiac, neurologic, or GI symptoms without any clinically apparent overbreathing by the patient.
