title: Postviral Vagal Neuropathy: What Is the Role of Laryngeal Electromyography in Improving Diagnostic Accuracy?
abstract: OBJECTIVE
  To investigate the convenience of laryngeal electromyography (EMG) findings in patients with chronic cough thought to be postviral vagal neuropathy (PVVN) with the clinical symptoms.
  
  
  METHODS
  Prospective cohort study.
  
  
  METHODS
  We applied PVVN questionnaire and chronic cough quality of life (QoL) questionnaire, which is for determining the effect of chronic cough on the QoL, to 20 chronic cough applicants who has no explanatory cause in differential diagnosis. We also carried out videolaryngostroboscopy (VLS) and laryngeal needle EMG in these patients.
  
  
  RESULTS
  The mean duration of persisting cough was 1.875 months (SD ±0.825). The overall mean symptom score of chronic cough questionnaire was 58.80 (SD ±9.89). There was a significant positive correlation between total EMG score and chronic cough score (Spearman r, 0.489, P < 0.05). The correlation between VLS findings and either chronic cough scores or EMG scores did not reach statistical significance.
  
  
  CONCLUSIONS
  Cranial nerves might be affected by inflammatory processes as occur in the PVVN, which must be considered in the etiology of chronic cough. We showed that the laryngeal EMG can be used as an appropriate diagnostic tool for these patients.
authors.affiliation: Department of Otolaryngology, Ministry of Health, Dışkapı Yıldırım Beyazıt Research and Training Hospital, Ankara, Turkey.
authors.forename: Emel Çadallı
authors.initials: EÇ
authors.lastname: Tatar
authors.affiliation: Department of Otolaryngology, Ministry of Health, Dışkapı Yıldırım Beyazıt Research and Training Hospital, Ankara, Turkey. Electronic address: bulentname@gmail.com.
authors.forename: Bülent
authors.initials: B
authors.lastname: Öcal
authors.affiliation: Department of Otolaryngology, Yıldırım Beyazıt University Medical School, Ankara, Turkey.
authors.forename: Hakan
authors.initials: H
authors.lastname: Korkmaz
authors.affiliation: Department of Physical Therapy and Rehabilitation, Ministry of Health, Dışkapı Yıldırım Beyazıt Research and Training Hospital, Ankara, Turkey.
authors.forename: Ece
authors.initials: E
authors.lastname: Ünlü
authors.affiliation: Department of Otolaryngology, Ministry of Health, Ankara Ulus State Hospital, Ankara, Turkey.
authors.forename: Ünzile Akpınar
authors.initials: ÜA
authors.lastname: Sürenoğlu
authors.affiliation: Department of Otolaryngology, Ministry of Health, Dışkapı Yıldırım Beyazıt Research and Training Hospital, Ankara, Turkey.
authors.forename: Güleser
authors.initials: G
authors.lastname: Saylam
authors.affiliation: Department of Otolaryngology, Karabük University Medical School, Karabük, Turkey.
authors.forename: Ali
authors.initials: A
authors.lastname: Özdek
mesh_terms: D000328:Adult; D002908:Chronic Disease; D003371:Cough / Q000175:diagnosis* / Q000503:physiopathology / Q000821:virology; D004576:Electromyography; D005260:Female; D006801:Humans; D007823:Laryngeal Nerves / Q000503:physiopathology* / Q000821:virology; D007828:Laryngoscopy; D007830:Larynx / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D011788:Quality of Life; D015203:Reproducibility of Results; D012307:Risk Factors; D049489:Stroboscopy; D011795:Surveys and Questionnaires; D013997:Time Factors; D020421:Vagus Nerve Diseases / Q000175:diagnosis* / Q000503:physiopathology / Q000821:virology; D014741:Video Recording; D055815:Young Adult
keywords: Chronic cough; Irritable larynx; Laryngeal EMG; Postviral vagal neuropathy