Evaluation and Management of Dyspnea

Initial Diagnostic Evaluation

The American College of Radiology recommends radiography of the chest, electrocardiogram, spirometry, complete blood count, and basic metabolic panel as first-line studies for patients with chronic dyspnea, followed by a stepwise evaluation based on initial findings 1, 2
Characterizing the quality of dyspnea is essential to guide diagnosis, with "chest oppression" suggesting bronchoconstriction and "air hunger" indicating restrictive mechanics 2
The initial evaluation should include a thorough history, physical examination, and laboratory tests to identify potential causes of dyspnea 2

Spirometry is useful in identifying obstructive or restrictive patterns, while complete blood count and basic metabolic panel help evaluate anemia, infection, or metabolic disorders 2
Oximetry can assess hypoxemia and the need for supplemental oxygen 2, 4
Point-of-care ultrasound (POCUS) can be added to the standard evaluation when there is diagnostic uncertainty, increasing the number of correct diagnoses 5, 2

The American Heart Association suggests that heart failure, coronary artery disease, and valvular heart disease are common cardiovascular causes of dyspnea 2
The American Thoracic Society recommends considering chronic obstructive pulmonary disease (COPD), asthma, pneumonia, pulmonary embolism, and interstitial lung disease as potential pulmonary causes of dyspnea 2

The European Society for Medical Oncology recommends treating reversible causes first, followed by non-pharmacological interventions, such as patient education, pulmonary rehabilitation, and exercise training 7, 4
Opioids are the only pharmacological agent with sufficient evidence for relieving dyspnea, and should be used judiciously, considering potential side effects 7, 4

The American College of Cardiology advises that clinical evaluation alone has high specificity but low sensitivity for cardiac causes, and should not be relied upon exclusively 2
Referral to specialty care or multidisciplinary clinics may be necessary when diagnosis remains elusive or when patients have refractory dyspnea with limited life expectancy 2, 4