Vocal Cord Dysfunction Diagnosis and Characteristics

Primary Respiratory Symptoms

Patients with vocal cord dysfunction experience dyspnea (shortness of breath) that is intermittent and variable in intensity, typically occurring during exercise or exposure to triggers, although the specific details of this symptom are not fully cited 1, 2, 3
Inspiratory stridor with throat tightness during maximal exercise that resolves within approximately 5 minutes of stopping activity is a key symptom 4, 3

Throat tightness or choking sensation is a hallmark differentiating feature of vocal cord dysfunction 3
Sensation of a lump in the throat (globus sensation) may co-occur with VCD as part of laryngeal hypersensitivity syndrome, according to the American Academy of Neurology 1, 2, 5
Chronic cough can be a manifestation of laryngeal hypersensitivity syndrome, of which VCD is considered a component, as noted by the American Academy of Neurology 1, 2, 5

Symptoms peak during exercise rather than 5-20 minutes after exercise, which is a critical distinguishing feature from exercise-induced bronchoconstriction, as highlighted by the American Academy of Allergy, Asthma, and Immunology 4, 3
Symptoms occur in response to salient stimuli as part of a conditioned response, with or without perceived panic or autonomic arousal, according to the American Academy of Neurology 1, 2

Failure to respond to asthma medications (beta-2 agonists, inhaled corticosteroids) is a critical historical feature suggesting VCD rather than asthma, as noted by the American Academy of Allergy, Asthma, and Immunology 4, 3
Variable flattening of the inspiratory flow loop on spirometry during symptomatic periods is a key diagnostic clue, contrasting with the expiratory flow limitation seen in asthma, according to the American Thoracic Society 4, 6
Symptoms are inconsistent with severity of any underlying structural pathology and may resolve completely between episodes, as highlighted by the American Academy of Neurology 1, 7

VCD frequently coexists with asthma (occurring in up to 20-40% of cases), making diagnosis challenging and requiring clinicians to maintain suspicion even in patients with confirmed asthma who have atypical or refractory symptoms, as noted by the American Academy of Allergy, Asthma, and Immunology 6