This initial drop in PaCO2 leads to the symptoms described above with a subsequent increase in minute ventilation to help alleviate the symptoms, only to make them worse with ongoing hyperventilation. Patients often have negative evaluations for causes of their hyperventilation with resultant anxiety about future hyperventilation attacks.
While anxiety disorders and panic attacks may be both an initiating and sustaining factor for hyperventilation syndrome, they are not necessary for the development of chronic hypocapnia.
R06.4 – Hyperventilation
191956005 – Psychogenic hyperventilation