respiratory system and chest symptom respiratory abnormality symptoms UMLS_ICD9CM_2005_AUI:A0284202 A respiratory system and chest symptom that is characterized by a respiration that is not normal and may include, but is not limited to: apnea, eupnea, orthopnea, dyspnea hyperpnea, hyperventilation, hypoventilation, tachypnea, Kussmaul respiration, Cheyne-Stokes respiration, sighing respiration, Biot respiration, apneustic breathing, central neurogenic hyperventilation, and central neurogenic hypoventilation. ICD9CM_2005:786.0 SYMP:0000598 UMLS_CUI:C0159053